“Giddy up!” Lisa laughs, bucking against my back like a bronco rider. It’s very innocent looking, but Lisa is humping her pussy against the small of my back as I splash around the pool. The front of my swimsuit is bulging just under the surface of the water and I see Mom staring at it, as Lisa rides my back. I dip down into the water and Lisa shifts from my back, up to my shoulders. I stand up again, with Lisa’s legs wrapped over my shoulders, and I grab her knees so she won’t fall. She is still laughing as she starts bucking again, humping her pussy against the back of my head. I tilt my head back making harder contact with her mound and look up to see her nipples pushing out her swimsuit top.
Mom is sitting on the steps, taking all this in, as I move toward her. When I’m about two feet from her and she can’t miss seeing my bulge, I arch my back, thrusting my hips toward her and throw Lisa backwards into the water. I smile at Mom, and she tries not to stare at my bulge, as I turn and swim toward Lisa. I grab her by the waist and we start wrestling in the water. A few minutes later, Lisa announces that she’s had enough and climbs out of the pool. She adjusts a lounge chair until it’s flat, spreads her towel on it and lies down on her stomach.
“You’re going to get burned, Sis,” I yell to her. “You should put some suntan lotion on your back.”
“Thanks, Jack,” Lisa yells to me. “Mom, would you mind putting lotion on my back?” Lisa asks innocently.
“Not at all, honey.” Mom grabs the lotion and Lisa scoots over to give Mom room to sit on the edge of the lounge chair. Mom squirts lotion on her hands and begins rubbing it on Lisa’s back and shoulders around her swimsuit strap.
“Undo the strap, will you Mom?” Lisa asks. “I don’t need a tan line across my back.” Mom flips open the fastener with one hand, lays the straps next to Lisa’s sides and continues rubbing the lotion on her bare back. Meanwhile, I’ve gotten out of the pool and I’m standing behind Mom. I reach over her shoulder for the bottle of lotion and squirt some onto my hands.
“You need some too, Mom,” I say, as I begin rubbing the lotion on her shoulders and back. “You don’t want to get burned, either.” I look over Mom’s shoulder at Lisa who looks naked except for her cute, little, swimsuit-covered ass. She’s smiling and encouraging Mom.
“Mmmm. That feel’s good, Mom,” Lisa says dreamily. “You give a great back massage.” Mom doesn’t respond. I’m not sure what she’s thinking about this daisy chain of back massaging, but it’s really turning me on. My swimsuit bottoms are tenting out, and my hard cock is only a few inches from Mom’s head, as I stand behind her, massaging suntan lotion on her back.
“I think that’s enough,” Mom says giving Lisa’s ass cheek a light smack. “You won’t burn now.” She turns to get up, bumps her cheek against my swimsuit-covered bulge and freezes. Her face turns bright red and her eyes stare right at my cock, but before either of us can react, Lisa interrupts us.
“Wait Mom, what about the back of my legs. Please put lotion on my legs too or they’ll burn.” Lisa spreads her legs apart on the towel covered lounge chair, and Mom turns around reaching for the suntan lotion. She rubs her lotion-soaked hands together and starts rubbing up and down on Lisa’s calf. I put my hands back on Mom’s shoulders and start rubbing lotion around, but she’s not going to let me continue.
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