"Who's gonna get Jeremy?" Mom asked.
"We'll just have to share!" Aunt Dee replied. "Hey, let's blindfold him and fuck him in the pool! Let's see if he can tell our pussies apart when we're in the water!"
And that's exactly what the two sisters did. They blindfolded me and told me to put my back to the ladder and hang on to the rails. They'd swim up to me, grab the ladder, and position their pussies over my hard dick. Then they'd impale themselves on it and ride me for a few strokes, and then disengage. They took turns for quite a while, and I honestly couldn't tell whose pussy was whose. But when my sister Diane joined the fun right after shagging Dad, I could tell her pussy right away, because it somehow felt different from the first two... tighter, maybe. Or just slicker from the cum that my dad had just deposited in her. The session ended with the three ladies removing my blindfold and watching as Diane wanked me to an orgasm with my cock still submerged, letting me watch my cum as it spurted into the water and sort of floated in a cloud before drifting away.
That week passed with me getting pussy from each of the ladies at least once a day. The first thing we did was replace my double bed with a queen-size one, as a testimony my new sex life. They taught me all they knew about pleasing a woman, and introduced me to every position I'd ever seen in porn. And they also gave me exercises in "edging," to extend my ability to stay hard.
Diane preferred doggy-style, which was fine with me because I could play with her tits as we fucked. Mom liked cowgirl, and Dee liked missionary, but we'd tried every other one. And the ladies introduced me to things like pee play and light bondage. Dee even let me fuck her in the ass twice. She liked that, but Mom and Diane didn't care for it. I didn't care about it either way, since a fuck hole was a fuck hole, but I did whatever my lovers wanted. And as a special treat for the ladies, Dad and I sixty-nined one night, and sucked cock until we came into each other's mouth. "There's lots of flavors in sex besides vanilla," Mom told me. "You should sample them all when you're young and horny!"
Dee went home at the end of the week, so for the next week it was just the four of us. When Dad was at work, it would be up to me to keep Mom and Diane sexually satisfied. But if I'd just cum and they were still horny, they did what Mom described: they either masturbated on their own, or they sought out each other, and let me watch them make incestuous lesbian love right there on the bed. I learned a lot about what turns them on that doesn't involve a cock, and incorporated that into my own lovemaking.
Afterwards, we'd do exactly what we would have done if we hadn't been fucking: housework, watching TV, chatting, swimming in the pool, or surfing the Internet. The only difference from before was that we'd be in the nude, giving me time to appreciate the differences in their bodies. Diane had the body that Mom probably had before two pregnancies and a few years of breast-feeding, but they were equally beautiful to me. And and I learned to appreciate my own body, too, I discovered. There's no substitute for nudity when you want to feel everything in your environment... the sun on your skin, the nap of the towel you're sitting on, the breeze in the backyard. I vowed never to wear clothes again if I didn't have to.
The following Friday, my mom's older sister Lori came over for dinner, leaving her three kids, two nineteen-year-old twin boys and a girl a year younger, behind to go to a rock concert. I'd wondered if she was in on the "family secret," but I needn't have worried. She was unbuttoning her blouse the moment she walked through the door, and inside of four minutes she was as naked as we were. There was no mistaking that she and Mom were sisters. Although Lori was a couple of inches shorter and a little thicker in build, they shared the same smile and hair color. And tits. Lori had breast-fed her kids, too, and it showed in their slight sag and elongated nipples. And from what I could tell, their cunts were identical, down to the meat protruding from their cunt lips, although Lori hadn't bothered to shave her bush, but kept it neatly trimmed instead.
And their sexual appetites were the same, too. As we ate dinner, Lori kept playing with her boobs and flirting with me, with the inevitable result that I had a hard-on almost from the moment I sat down. It was understood that we'd be fucking after dinner, without a word being spoken. After dessert, when I stood up, she came over and said, "Let's go play now." Mom and Dad grinned, but Diane gave a mock pout. "What am I gonna do?" she said. "Just wank?"
"Come to bed with us," Mom said. "Your dad hasn't had a threesome in a long time. You're always welcome to join us, you know that! I want first crack at his boner!"
"You mean his first boner at your crack!" Diana replied, and we all laughed.
When my aunt arrived at my bedroom, the covers on my new bed were already turned down. She lay on her back, spread her legs, and said, "Now that you're fucking, show me what you've learned!" That was a challenge I couldn't resist!
"I'm going to last a lot longer if you let me cum first," I told her.
"Well, how would you like me to do it? A blowjob? A handjob?"
"Well, may I have a tit-job, please? Your tits are really sexy, and I'd love to have my cock between them!"
"I was just thinking the same thing! Go and get a bottle of baby oil!"
"There's one in the nightstand drawer." I fished it out and gave it to her. She oiled up those beautiful breasts of hers, and then put some oil on my cock and balls. She wasn't going to make this easy for me! But I let her massage her tits and bring her nipples to hardness. Her breasts were obviously as sensitive as her sister's were, and she was as capable of reaching an orgasm from breast stimulation alone. That must run in the family, I reflected. But as she approached a climax, she said, "Now slide it in and let me feel it!" and she pushed her breasts together to form a warm, snug tunnel for my cock.
I straddled her and shoved my cock between her tits. "Fast or slow?" I asked.
"Slow at first. I see you've done this before. With your mom? I thought so! You're so much like your father! Same size cock, same slow pace!"
After a few minutes of this, I knew I was going to blast, and told her so. "Faster now!" she barked, and she pushed her breasts together to tighten the tunnel. A few more strokes, and then I was depositing cum all over her chin and throat. She released my cock from the tunnel of her cleavage and brought herself to a small climax with a tweak of her nipples as my cock dripped the last of its load onto her breastbone.
I licked my cum off her body, to her delight. She rewarded me by giving me a long, deep French kiss. Then she broke it, saying, "Well, let's see what Dee and Linda taught you. I want you to eat me and finger-fuck me. You know how to do that, right?"
I laughed. "For the last two weeks, I've been in training! Let me show you what I've learned!"
And I did. I used every trick I could think of ... the two-finger curl, the hand-flex, and this trick Dee taught me about tickling a woman's G-spot with one hand while squeezing her clitoral hood, massaging the clit without actually touching it. Lori liked that! It looked like I was giving her a series of electric shocks, jolting her body with each squeeze. And then I started in with my tongue, doing all the tricks I'd learned about teasing her cunt lips and clit. I did the "alphabet dance" and the "bite and suck" and the "tongue thrust" while my fingers were in her cunt.