"Oooohhhh fuuuuuck!" Linda could hear her sister, Veronica, moan from the bathroom upstairs. She slowly made her way up the stairs, hoping not to alert anyone. She had to make sure she was really hearing what she thought she was hearing.
When Linda got to the bathroom doorway, she saw it was already slightly open. She pushed it the rest of the way and it swung into the room.
Linda gasped loudly enough that both Veronica and her son Lee looked at her, but it didn't matter, Linda could see them. Her sister was naked, thrown over the sink like some kind of common slut, as her son, Lee, fucked his mother from behind. Linda gasped again when she saw that Lee's cock was positively massive.
Veronica looked up and saw her sister, she smiled at her sexily, Veronica wasn't the only one to inherit the beautiful looks in that family. Linda had tits almost as big as hers and a nearly perfect, fit body that just screamed: "Fuck me!" Veronica knew Linda had been trying to get pregnant and had come over to discuss with Veronica what type of fertility treatments they could try next, something Linda didn't know was that Veronica had discovered a new fertility treatment that guaranteed pregnancy, of course, that method also happened to be Veronica's big-dicked son!
"Oh Linda, FUUUCK THAT FEELS FUCKING GOOOOOD!" She moaned as her son continued to ruthlessly fuck her pussy in full view of her sister and his aunt, she cleared her throat and calmed down, "Sorry, as you can see my son has me a bit indisposed at the moment."
"As I can see?" Linda repeated, absolutely in shock, "But he's
fucking
you!"
"I know!" Veronica said as she fake-complained, "I've been trying to get him to stop but he literally won't give me a break. I mean it, my pussy is already incredibly sore from the fucking he gave me last night!"
Lee watched this conversation happening as he continued to fuck his mother's tight pussy. Mostly he watched as his aunt stared directly at his dick as he thrust it inside Veronica's cunt. He knew what she wanted. He pushed his mom off his dick to see if he could be sure. "You want this cock?" He asked his aunt as he stared her down with his hard cock as he faced her.
Instead of answering Linda merely gulped as Lee's cock came into view, glistening from his mother's pussy juices. She knew it was wrong, but she
did
want that big fucking cock right in front of her. But there was no way she could tell her nephew that, especially not in front of his mother! Even if he was just fucking her a moment ago!
Lee took Linda's silence to prove she wanted him. He took a step towards his aunt and grabbed her by the hips. "Oh!" She yelped in surprise as Lee pulled her towards him and started making out with her. She didn't push him away, instead, Linda sucked on his tongue like a good slut.
Since both her son and sister's mouths were occupied for a moment, Veronica saw this as a perfect opportunity to explain her plan to Lee and Linda, "Okay, well, I discovered Lee's amazing virility last night. He cums both in gallons, seemingly, and his sperm count is through the roof!" She didn't really know this second part as they never actually got a sample the night before because they were too busy fucking, but Veronica was sure her son could get her sister to carry a child. "This man can help you get pregnant Linda, it's as easy as that!"
Linda heard this, despite her nephew's tongue being a huge distraction, she stopped kissing Lee for a moment so she could ask a question though, "But I can't get impregnated by my own nephew?!" She said, even though she was unconsciously grinding her pussy, underneath her skirt and in her panties, up and down the length of her nephew's naked, giant cock while she spoke to her sister, "I mean, and do you expect us to fuck or are you talking getting artificial insemination? I mean, I can't fuck him, even if he wasn't my nephew. I'm married!"