Take her

You slip off the shelf and back into the water. As of anticipating your next move, Kelsi drops down in front of you and leans forward with her arms resting where you had both been seated a moment before. She looks back at you and smiles as she wiggles her sexy little ass.

Under the water you pull her bikini to the side and like your cock up. Her ass offers little resistance as you push into her, but she still manages to be a hell of a lot tighter than Kelly's pussy after two kids.

"Fuck me...quickly," Kelsi said. "We can take our time later tonight."

There is no going back, so without any further thoughts you breed her ass hard. One nagging part of your brain reminds you that you are ass fucking the boy who was like your nephew until four years ago...but the dominant part just sees the hottest woman you've ever seen at the end of your hard cock.

"You feel so fucking amazing, Uncle Jason," she moans.

"So do you."

You lean in and kiss her as you pound her ass. You'll worry about the consequences later, right now you just fuck, wild and hard.

You bust a nut in her asshole, just as you hear the sound of the garage door opening. Kelsi slides off your cock and gives you one last, lingering kiss before jumping out of the pool. She grabs her towel and hurries inside, adjusting her bikini as she runs.

A few minutes later, after your cock has softened and is tucked back into your speedo, Derek steps out of the house with a beer in each hand.

"Jason!"

"Derek!" you reply. "Had to borrow a speedo. Fuck man... can't you try buying some trunks?"

"Why hide it, brother?" he laughs as he hands you a beer. "I guess you saw...my kid?"

"Yeah, all grown up."

"I guess man," Derek said. "We're still adjusting to things around here, I guess."

The two of you spend the next hour catching up before you head upstairs to shower and change.