“Your hole is stretching a lot. Like two times more than when you use your fingers?”
“That’s right. Vaginas are very flexible. That’s why I can take something so huge without hurting. But remember that you must be plenty wet before you can accomplish this.”
“I know! They keep repeating this to us at school.”
“That’s because it’s important. As long as you’re wet and aroused, most sexual acts will feel pleasant.”
“Were you wet enough, Reese?”
“Yes. Wade has been stimulating me since yesterday. For some reason, he ate my pussy for hours when we were watching TV.”
“Oh, that’s nice.”
“Yes, I couldn’t take it anymore at the end and asked him to make me orgasm hard ten times.”
“Did he do it?”
“He did. It was incredible. And now your sister is deep in debt with your brother.”
“Hahaha. Why did you do that, Wade?”
The normal conversation between one sister being screwed and the other one staring at the scene suddenly turned to me. I tried my best to come up with an answer through the pleasure I was feeling.
“Huh, that’s… because I thought Reese’s vagina tasted great.”
It was a stupid answer, as proven by Reese’s snort and June's laugh.
“Pfft! You’re funny, Wade! Okay, you two should finish this and come eat breakfast.”
“We should… Come on, Wade. Blast my pussy to oblivion and let’s cum together.”
Those words combined with the situation pushed my arousal so high that I entered berserk mode. I started banging Reese at full strength, my thighs clapping against her butt cheeks several times per second. My dick was going in and out of her soft cunt at extreme speed, the sound of our sex resonating in the room. June watched this happening with a smile and couldn’t help asking her sister.
“He’s going quite strong. How does it feel, Reese?”
“Aaahhh! Aaahhh! Aaahhh! W-wait a second, June. Aaahhh! Let me focus on orgasming first. Mhmm! Aaahhh! Aaahhh!”
“Sure!”
Just like she asked, I was gouging her twat plenty. Contrary to when I gave her cunnilingus, she seemed to feel it more because she was letting her voice out freely. I felt myself getting close to my release as her tight pussy squeezed my dick continuously.
“Aaahhh! So strong! I like it! I’m close! I’m going to come! Coming! Coming! Mhmmmmmm!”
“I’m cumming too!”
Together with a nice moan and an extreme contraction of her vagina, she orgasmed on my cock. This pushed me over the top too. I glued my glans to her womb entrance and ejaculated strongly inside her with a groan of pleasure. It felt the best to fill my big sister's pussy full of my spunk. I sent jet after jet of sperm deep inside her while she shivered in climax, both of us enjoying the sensation together.
Eventually, she lost strength in her legs and fell on her side on the bed. My penis got ejected from her warm cunt while I admired her post-orgasmic appearance. She was breathing hard, a pleased expression on her face, twitching a little from time to time. After a few seconds, a bit of my semen flowed out of her snatch, smearing the bed under her.
“How good was the orgasm, Reese?”
Reese turned her head toward June to answer her.
“Not too bad. We lost a bit of the buildup because we hurried to the end but the pounding was decent. It helped that this was my first dick in months. And feeling hot sperm inside me is always nice.”
She slowly rose on all fours again and approached me. She took my cock in hand and started licking it, taking me by surprise. She lapped it a few times before putting it in her mouth. I sensed her tongue going around my length, cleaning every nook and cranny. Soon enough, she released me with a satisfied hum.
“All clean.”
“T-thanks, Reese.”
“No need for thanks when I’m doing something so basic. June, you should remember this too.”
“Yes!”
“Now, give me a second.”
She stood up and we heard her going to the bathroom. A minute later, she was back, her pussy as clean as my dick. We put some clothes on and went to the living room to eat breakfast. My mother was already seated, watching the TV while waiting for us. June apologized in our stead first.
“Sorry, Mom, it took a long time.”
“Don’t worry, dear. I heard everything. Sex is always the priority. It’s good that they managed to cum together like this.”
“Except for the fact that I’m deep in debt now.”
“That would be true if he just gave you cunnilingus. But since he came inside you, you might become pregnant. There’s no difference whether he gets you pregnant or someone else does. It’s all worth it if you give birth in the end.”
I never even considered the fact I could make my sister pregnant. Since incest didn’t exist, it made sense that was a possibility in this world. It was both a weird and exciting realization but I wasn’t sure how I felt about it.
“What’s the probability of that happening? We don’t even know if he’s fertile.”
“Speaking of which, I heard you became a quick ejaculator, Wade?”
“Well, yeah. Somehow.”
“That’s good. Are you interested in impregnating women?”
“…I guess so.”
“Then, you should try checking your fertility. If you’re fertile, you’ll have an easy life, just like me.”
“How does that work?”
“They’ll explain everything to you when you go to the breeding center. To summarize, you just need to impregnate a woman once. When that happens, it’ll be proof that you’re fertile.”
“I-I see.”
The idea of proving my fertility by inseminating a girl in some sort of “breeding” center seemed fantastic. This career path was getting more and more attractive. Even failing the fertility test would net me some good memory, in the worst case. I had previous plans for the weekend but changed my mind at this moment.
“Is it open during the weekend?”
“It’s open every day but it’s busier during the weekend. This is when people have the most time, after all. Do you want me to come with you?”
I wasn’t too sure about making my mother watch me trying to knock up some random girls. I wasn’t so high in the kink levels yet. Or was I?