Family Ties/Going for a swim.
"How about we just go for a swim in the lake while the others are out screwing around." You suggest as your mother moves back to a standing position, running a hand through your unruly hair.
"Sounds good to me baby, I am already dressed for it." She giggles. "I just hope you can keep your hands off my pussy long enough for us to swim." Your mom doesn't exactly make a convincing case, not that you have any intentions of making any promises.
Instead you give her ass a pinch and head back to luggage room and grab your bag and pulling out your swim trunks, strip, and pull them one. As you are replacing your bag were it came from you glance back into the back bedroom noticing Heather's bikini buttoms abandoned on the floor, left there so she could make her pussy more excessable to your big brother.
After your ready you walk back in the center of the RV and take your mother by the hand and lead her out and down to the lake. There aren't many people swimming today, with it being so early in the session the lake and short is pretty sparse. You and your mom wade into the lake where there aren't many people around and those that are aren't really paying any attention to you despite the reaveling bikini your mom is wearing.
Once in the lake neck deep you are paddling gently infront of you mom and she grabs you and pulls you tightly to her body. Your cock is pressed against her and her tits around right against your chest as she stares lovingly into your eyes. To those watching you look like any other mom and son splashing around in the lake, having a good time. No one is the wiser that you mom has slid her hand up up your thighs and into your swim trunks, squeezing and mssaging you ass cheeks. Just under the water line you are squeezing her titties, making her moan and giggle and the two of you grind against each other.
"I knew you would be able to keep your hands to yourself." She says, Looking like she desperately wants to kiss you. "Well, I am not exactly behaving either huh baby?" You shake your head and under the water grab her bikini top, giving it a firm yank, splitting it so her tits spill out into the cool water of the lake.
"Timmy?! You horny little brat. Bad enough your father figured out how bad I want to fuck you.., I am note sure I could explain it to all these people." Dispite what she just said she only squeezes your ass hard and pulls you deeper into her breasts. "I suppose if we were careful we could do something about that big bone of yours." She says with a naughty smile.
You could: