I had not experienced such a headache in years. For some reason, my head, eyes and neck hurt a lot that day. I looked at my watch. It was only 2 p.m. I knew I couldn't take another three hours of this discomfort, so I told my boss that I wasn't feeling well, and decided to go home. My wife Gina was at work, and I knew she wouldn't get home until 6 p.m. that day. Every Friday, it was the same. Being a bank teller, she had to wait long hours for people who came in to cash checks on pay day. So I figured I'd have the house to myself for a few hours. I wasn't sure if Julie had school that day. I shrugged my shoulders and got in my car.

Julie was our house guest. She was going to school, studying for an advanced degree in elementary education. She was a school teacher. A really beautiful girl, she was about 30, with a nice figure, a typical California beauty. She lived with us, and kept pretty much to herself. She had a nice, gentle dog, who was very friendly with me. She had been living with us for almost six months now. During that time, it was inevitable that I had seen her in various degrees of undress, but she was always careful not to reveal herself. Yet on few occasions I had been able to glance down her cleavage when she bent over to pick up something. It was an exciting sight, for she had nice breasts (at least size 36), and she always wore a low-cut bra that showed a lot of cleavage. On other occasions, I had a glimpse up her dress when she would get out her car, or sit on the sofa, and I would see a flash of her panty. I was terribly attracted to her, and often had a difficult time controlling my arousal when she was around. After a while, I didn't even bother about it, and let it happen. As a result, most of the time I walked around with a stiff pole in my underwear, clearly visible to my wife and our guest. Julie never said anything, but I knew she had noticed it, because I saw her stealing glances at my midriff with an amused expression and a slight smile. I had a feeling she was also attracted to me. A few times my wife teased me about my hard-on, copping a feel when Julie wasn't looking. Since Gina and Julie were good friends, I kept my distance from Julie.

That summer, it had been particularly hot. Since we did not have air conditioning, we all used to walk around with minimum clothing around the house. I often skipped underwear and just wore loose-fitting boxer shorts, which did a poor job of concealing the size and shape of my cock even when I wasn't aroused. I loved the feel of soft cotton fabric against my skin, and often sported a partial hard-on especially when Gina and Julie wandered around in their skimpy clothing. Gina usually wore a loose-fitting dress that managed to hide her ample attributes, but without a bra and panty, she might as well have not bothered. I often teased her often about it, and fondled her breasts openly though the dress or squeezed her butt, but she ignored me lasciviousness. She is a knockout, my Gina, with a 38D-24-36 figure. Julie also used to wear skimpy clothing, a bikini sometimes, or a really short and thin dress which did nothing to hide her figure. She always wore her undergarments, but it still caused me to have an obvious erection. A couple of times when she was wearing a bikini bottom under a tee shirt, I had caught a glimpse of her golden-red pubic hair, sticking out from around the edge of her bikini panty, and it always stirred my pole to attention. I knew she had seen the hardness in my boxer shorts, but except for a knowing smile, she said or did nothing about it.

Her dog used to follow me around the house. One time, I was puttering around in the garage. It was hot, and I was feeling very horny. The tip of my cock was sticking out from the bottom of the boxer shorts. The dog came around, and started sniffing at it. Before I could react, he stuck his tongue out and licked me. My cock immediately sprang up with excitement, and the dog just followed its jerky motion, licking in earnest. After I got over the initial surprise, I pulled the cock out and let the dog slobber all over it. It felt so good. I closed my eyes, and let the dog lick me. Soon I was panting. I grabbed my shaft and started pumping it in the dog's face. He kept up with my frenzy, and was ready when I shot my load straight into his face. The dog just lapped it up, driving me crazy with pleasure. After that, the dog and I became real buddies. I got bold enough to play with his cock, and figured out how to bring him to a jerking orgasm, fascinated by the humongous swelling of the glands at the base of the cock. I had never seen anything like that before.

I thought about the dog as I headed home, wondering what might happen with just the two of us in the house. I walked in and took off my shoes. I went to the bedroom, undressed, and put on my boxers. As I headed for the kitchen, I heard a whimpering sound, coming from Julie's room. The door was slightly ajar. I tiptoed to her room and peeked through the crack. I couldn't see anything, because the windows were closed and it was kind of dark. I heard another moan, and realized it was Julie. Curious, I slowly opened the door, and got the shock of my life.

Julie was stretched out naked on her bed, with her legs spread apart. Her dog was licking her cunt, and she was moaning with pleasure. Her breasts were taut, with the nipples sticking out in the air. She was holding the dog's head in her hands and jerking her hips back and forth as the dog licked her. Her eyes were closed. I slowly tiptoed into the room and closed the door behind me. My cock was sticking out in front of me. I pulled the boxers down and stood in the doorway, watching. Julie tugged at the dog's head. The dog jumped up and lay flat on top of her, his long, red cock throbbing against her pussy. The dog jerked forward and I saw his cock slowly disappear in her cunt. Julie put her arms around the dog, and moaned loudly as the dog started humping her. I watched, aroused beyond description as the dog fucked his mistress, and licked her face. My cock was throbbing so hard that I knew I was almost ready to shoot my load. Julie's eyes were still closed, but her mouth was open, as she breathed heavily. I quickly moved closer to the bed, and stood over her. Grabbing my cock and aiming it at her mouth, I started pumping, and almost immediately felt the tightening of my balls. I shot my cum straight into her mouth, just as she opened her eyes. She quickly tried to push the dog away, and sit up at the same time, but the dog was not ready to dismount as yet. He began thrusting his pelvis and I watched in astonishment as his thick knot penetrated Julie's stretched pussy lips and disappeared inside. Julie screamed with pain, as she tried to push the dog off, but it was no use. The dog whimpered loudly as his cock started to swell, and he began shooting his cum in her.

Julie covered her face in her hands, and began crying. I knelt beside the bed, and cradled her head in my arms. She again tried to push the dog away, but he was locked into her, and it would be a while before he could pull out. Realizing the predicament she was in, Julie started sobbing with utter embarrassment. I wiped her tears and pulled her into my arms.

"It's all right, Julie. Don't cry. I won't tell anyone."

She just sobbed in my arms. I patted her soft golden hair. After a few minutes, the dog slipped out of her, and retreated to a corner of the room and started licking himself. Julie tried to get up, as she looked for the bed sheet to cover herself.

I got up, and retrieved my shorts. Julie sat up, covering herself with the sheet, and hid her face in her hands. "Please leave, Sam. I need to be alone."

"No, Julie. I think we need to talk." I went over, and sat down next to her. I was still aroused by what I had seen. I pulled her in my arms and held her tightly, kissing her deeply. She moaned and melted in my arms.

"Julie, how long have you been doing it with the dog?"

"Not long. I don't do it often. Only when my period gets closer, I feel the urge, because it relieves the pain."

"Gina told me about your difficult periods. I'm sorry you have to suffer so much. Gina also has difficult periods sometimes."

"I know. We talk about it all the time. Oh, Sam. Please don't say anything to her about this. I'll do anything for you. Please don't hate me."

"Well, you fear unnecessarily. I don't hate you. I am shocked, but frankly also terribly turned on."

"But what about Gina?"

"Gina loves you. She won't think bad of you if she knew. In fact I'm sure she will understand. We talk all the time about how sexy you are. Gina teases me all the time about it because she knows I get a hard-on looking at you."

Julie suddenly laughed. "I know. I've seen it too. But I had never seen you naked. You are so very handsome."

"Thanks. You are very sexy, too. Anyway, what's with the dog? How many times have you done it with him?"

"This is only the second time I let him. I saw you one time when you were taking a shower. I needed a new towel, and all the ones I had were in the wash. So Gina told me get one from your bathroom. The door was unlocked. I didn't know you were in the shower. That's when I got a glimpse of your body behind the glass door. I was so turned on, I didn't know what to do. When I came back to my room, the dog came in and started sniffing my crotch. So I sat down on the carpet, took off my panty and let him sniff more. Soon he was licking me. It felt so good, Sam, I wanted to fuck. So I started playing with the dog, and before I knew what was happening, he was jumping all over me, shooting his cum everywhere. His cock was so big and red, I came just looking at it. After that, I started experimenting with him. I got a book from the library and read up on dog's sexual organs. I found out about the knot at the base of a dog's cock. It swells the size of gold balls when he is ready to come. So I knew that if I ever let him mount me, I'd have to prevent the knot from getting in."

"Looks like you have done your homework. How does it feel to have a dog's cock in your pussy?"

"It feels great, except there is always this fear of him penetrating too far. So I let him lie on my belly. That way, he can't go in too deeply. But you caught me by surprise, and I couldn't stop him from pushing in all the way. Please don't say anything to anyone about this, Sam. I'll never be able to show my again to anyone." Julie pleaded with me.

"Relax, Julie. The only person I would talk to is Gina. We don't keep secrets."

"Won't she be angry?"

"There is only one way to find out. I'll tell her when she gets home."

Julie panicked. "Please don't, Sam. She'll throw me out. I can't afford to go anywhere else in the middle of the school year, Sam."

"Don't worry about it. I promise you I won't let you go out on the street. Right now, I am so turned on by what I just saw, Julie, that I want to fuck you. But I need to recover from my orgasm."

"It's okay, Sam. I need to recover, too."

I kissed her deeply and pushed her down on the bed. I pulled the sheet off her beautiful, naked body, and lay down next to her. We embraced and kissed. We were both turned on. Julie reached between our bodies and took hold of my limp cock as I fondled her breasts, and caressed her butt. I massaged her voluptuous body with rising passion, keenly aware of the most pleasurable sensation in my groin as her fingers caressed and squeezed my cock. She dragged her fingernails over my pulsating bulb, making my cock twitch as it began to harden again. She cupped my balls and caressed them.

"I want to suck you, Sam."

"Be my guest," I replied with joy, and we immediately turned around. Julie opened her mouth to take in the tip of my cock as I adjusted my position to get between her legs. I pulled her on top of me, and watched her glistening, golden-fleeced mound as she lowered herself on my face. Her pussy looked absolutely beautiful, glistening with the juices of her passion. I pressed my lips on the folds of her vagina and traced its shape with my tongue, stopping at the apex where her inflamed clitoris nestled in the folds of her sweet cunt. In the meanwhile, Julie had revived my cock, and was slurping the length of it, kissing and sucking the shaft like a lollipop.

We pleasured each other for several minutes in this position. I reached for her firm breasts, and caressed the succulent flesh, pinching her hard nipples. With the other hand, I squeezed her butt, pushing my finger between the crack, and found her anus. The whole area was wet from her earlier fucking with the dog, and I had no difficulty inserting my finger in her asshole. She flinched at the contact with the forbidden passage, and lifted herself off my face.

"Please, Sam. I don't like it there. It is too painful. Besides, if you really want to do it, I need to cleanse myself properly. I just don't feel comfortable about it right now. Let's just do the normal stuff."

I nodded, and pulled her back down on top of me. I stuck my tongue in her cunt and began fucking her with it. She moaned and bounced on my face, rotating her hips against my lips. She was quite aroused, and was beginning to drip her love juices all over my face. My cock was also ready for another round.

I rolled her over, and climbed on top of her. "Ready for another round, Julie?"

"Yes, Sam. Please fuck me. It's been so long since I have had a man's cock in my pussy. Fucke me hard, Sam."

I fondled her breasts, and kissed her nipples. I opened her legs, and positioned myself. Julie reached down and grabbed my cock. She guided it to her cunt, and said, "Push it in, Sam. It's been such a long time since I had a taste of a man's cock. Oh, God, it feels so good. Oh, my God, I can't take the pleasure."

She bucked and pushed against my shaft as I buried it all the way in her. Soon we were furiously fucking each other, enjoying the illicit intimacy to the fullest. Julie cried out as orgasm shook her body. She clutched my arms, panting breathlessly, and urged me to fuck her harder. I pumped her with all my might, slamming my swollen cock deep into her tight cunt. She was really tight, not having had a lot of sex since she didn't have a boyfriend. That suited me just fine, since her tight cunt was sucking and squeezing my hard cock like I had not experienced in a long time.

The impact of my pelvis ramming against hers made loud slapping sounds. I felt the cock grow in size as my orgasm approached. I gritted my teeth, and plunged. My body shuddered as I exploded inside her. Julie wrapped her legs around my waist, holding me tightly. I collapsed on top of her, my head resting in her cleavage. Her wonderful, fleshy breasts felt good against my face.

After a few minutes, I kissed her, and got up. Immediately, the dog sprang to his feet. He came forward and began licking my cock, slurping his way all around my shaft. Julie watched in fascination.

"Did you know that he does that to me often?" I asked.

"Yes. I saw you with him in the garage once. I was so turned on, my panty was soaking wet. I so much wanted to come and fuck you."

"Why didn't you? I've wanted to fuck you, too."

"I was afraid to ruin our friendship, Sam. But I've been tempted so many times when I see you walking around in your skimpy boxer shorts. I can see the shape of your cock, and I'm so tempted to pull the shorts down and suck you. But I am afraid of hurting Gina's feelings. She is my friend, and I don't want to hurt her."

"I understand perfectly. That is why I haven't done anything about it either. But now that the barrier is broken, I think we should all come out and tell each other how we feel. I know Gina won't mind if we fucked. She will probably join in, because she loves a good fuck as much as I do."

Julie laughed and said, "I know. Gina has told me many times how you fantasize about me when you fuck her. She told me once that she was going to have me join you two some day."

"Really? She never told me. Wow. Just the thought of fucking you and Gina at the same time is making me hard already."

Julie clung to me. "Sam, you were wonderful. It's been such a long time since I have had such deep fucking from a man. I can't get over the size of your cock. See, it is already hard again. How do you do it, Sam? You already had two orgasms."

"It's because of you, Julie. You are so fucking sexy that I would never get my cock down to a soft condition. Besides, you are a hell of a good fucker. Your cunt is so tight, it drove me crazy when I was fucking you."