It’s a Saturday, so we wouldn’t normally be able to do anything, but Lisa is horny as hell and won’t leave me alone. It’s her idea for us to go swimming, and fuck in the pool, while Mom is busy doing laundry and watching TV. I tell her it’s too risky but she keeps teasing me, touching my cock and rubbing her tits against me all day. Around 2 o’clock, Mom decides to take a nap. That’s when I give in. We change into our swimsuits and rush out to the pool.
As soon as we hit the water, Lisa takes off her swimsuit bottom, swims over to me and pulls my suit down. My suit is hooked around one ankle, as I put my arms up on the side of the decking, and Lisa impales herself on my already rigid cock. Her face is about a foot from mine, as she furiously bounces up and down on my cock, making waves across the swimming pool.
“How’s the water?” Mom asks, sticking her head out of the sliding glass door.
“Great!” Lisa answers. She stops bouncing, but keeps my cock buried deep inside her tight, wet pussy.
“The temperature is perfect and the sun isn’t too hot today.” I’m impressed. She’s carrying on a conversation with Mom, while her pussy muscles continue to milk my cock. She’s acting like nothing is going on while I, on the other hand, am freaking out about getting caught.
“Good, I couldn’t sleep so I thought I might join you two for a swim,” Mom says. “I’ll get my suit on and be right out.”
“Great, Mom!” Lisa shouts. “Wear that sexy new pink swimsuit you bought. I haven’t seen you in it.”
“Okay.” She closes the door and Lisa starts bouncing up and down like a mad woman.
“Are you crazy?” I ask. “Mom’s going to be out here in a minute. We have to stop and get our suits back on.” I can’t believe she wants to keep fucking with Mom coming out.
“Just a few more minutes, Jack,” she says, panting. “It’ll take Mom a while to get changed. I’m so close. It won’t take long.”
She is watching the door, bouncing on my cock and grinding her clit against me. Just as she starts to cum, I hear the sliding glass door open. She pushes down hard, clamping her hot, quivering pussy around my cock. As Mom is stepping through the sliding glass door, Lisa quickly jumps off my cock and swims away from me. We both struggle to get our swimsuits back on, before Mom gets to the pool.
Lisa is smiling at me and treading water in the deep end of the pool. Mom is walking down the steps, in the shallow end, near me. Mom keeps herself in shape and looks about ten years younger than her 37 years. She’s wearing a light pink two-piece swimsuit that shows off her tan, well-toned body. As I watch her get in the pool, it’s easy to see where Lisa gets her sexy shape. Mom’s flat stomach, the curves of her ass and her shapely legs all remind me of Lisa. Her breasts are much larger and a lot more of her tits are visible before they disappear behind the small triangles of her swimsuit top.
This suit must be smaller than her others because there is a thin white strip of skin between her swimsuit top and where her tan begins. Her swimsuit bottom is just a small V shaped piece of material covering her pussy with strings tied on the sides that connect to the material covering her firm, round ass. I’m not sure why I’m suddenly noticing all this about our mom. Maybe it’s because my sister has gotten herself off and left me with a raging hard-on.
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