My Virgin Sister 10

"No, Jack. I've been watching Mom, too. It might be my imagination but it seemed like she was intentionally putting on a show for you today. I can't envision Mom taking it any farther than that, but if you ever do fuck her, I want to suck your cock immediately afterwards. I want to know what she tastes like!" She laughs and gives my cock a final squeeze before swimming off toward Mom. I watch Lisa get out of the pool, get the suntan lotion and sit down next to Mom on the pool steps.

"You're going to get burned if you're not careful, Mom," Lisa says, sitting down beside her. "That's a very sexy suit, but it doesn't cover you the same way your old one did." With that, she squirts a little suntan lotion onto her fingers and starts rubbing them over the white patches of skin on Mom's tits.

Mom looks startled and starts to sit up. "Here honey, I can do that," she says. Lisa ignores her and just keeps rubbing the lotion over her full, plentiful breasts.

"It's alright Mom, you just lay back and relax. I'll keep you from getting burned." Lisa looks over at me, and winks, knowing how I'd love to be rubbing that lotion around on Mom's tits. Mom reluctantly lays her head back and lets Lisa rub suntan lotion on her chest. Mom is lying with her back partly on the deck with her legs in the water up to her knees. As Lisa's fingers are massaging Mom's tits, I notice the heel of her hand keeps brushing lightly over Mom's erect nipples. They seem to push out a little farther and become more pronounced, with each pass of Lisa's hand.

Lisa squirts more suntan lotion on her fingers and starts rubbing it across Mom's stomach. Mom's swimsuit bottom is also smaller than her old one and she has white stripes of skin across the top and down the sides of the small triangle. Lisa is massaging suntan lotion over Mom's stomach and lower abdomen with her fingers, while the heel of her hand lightly brushes against Mom's mound. With her other hand, Lisa is rubbing lotion on Mom's upper thigh and along the side of her hip where the swimsuit didn't cover. By now Mom has her eyes open and is staring at Lisa. She seems to be trying to figure out if this is innocent helpfulness or a sensual massage. She can't seem to make up her mind.

"That's enough, Lisa. I'm going in the house anyway. Too much sun isn't good for me. You two need to come in soon, too," Mom says, getting up and quickly walking into the house.

"Looks like you enjoyed the show," Lisa says, as she pulls my swimsuit down and starts vigorously stroking my stiff cock. She quickly slips her swimsuit bottom down, wraps her legs around me and pulls me inside her snug, wet pussy. "Now, where were we?" she asks, as I start frantically pumping in and out of her.

"That was really erotic, watching you touching Mom," I tell her, as our rhythm heats up. "You are a kinky little girl, Lisa. I guess that's why I love you so much." I'm panting and pushing into her faster and faster. She thrusts her hips down to meet my strokes and in no time we are cumming together.

"Touching Mom really turned me on and I'm pretty sure it turned her on too," Lisa says, as her breathing returns to normal. "I suspect that's why she left so fast. I don't think she knew what to make of her body's sexual reaction to her daughter touching her. I bet she's horny as hell with dad gone. And the way she was looking at your cock, I bet we could get her so hot that she'd beg you to fuck her." Lisa squeezes her sopping wet pussy around my cock as she's saying this. "I'm going to give her some time and then I'm going to seduce her, for both of us."

A couple of months later, Lisa does seduce Mom, but before that happens Lisa comes up with her sexiest and kinkiest idea yet.

When we graduated from High School in June, Mom suggested we take the summer off and enjoy ourselves before going to USC in the fall. Dad is about four months into his six-month tour, which means we have the house to ourselves all day. As soon as Mom leaves for work each morning, we crawl into bed with each other. Sometimes we just snuggle our naked bodies together and fall back to sleep, waking up later to start fucking. Some days we stay naked all day, watching TV, doing our chores, fucking and sucking as we go.

One day, Lisa woke up before me and made my most erotic fantasy come true by wrapping her hot lips around my morning hard-on and gently sucking me awake. If you've never had anyone suck you awake in the morning, you don't know what you're missing. It starts in an unreal dream-like state and then gradually you begin to feel the warm, wet licking and sucking sensations, and before you're really awake, you're humping your fully aroused cock to its ultimate climax. It's amazing and so is my sister.

Anyway, back to the sexiest and kinkiest. Late one night in the middle of summer, I'm just about to turn out my light and go to sleep, when Lisa comes in my room.

"Look what I found on the Internet," she says, excitedly, shoving a piece of paper in my face. At first, I'm not sure what I'm looking at, but Lisa gets all animated, pointing at the couple in the picture and describing what they are doing.

"It's a harness," she says, enthusiastically. "See the woman is suspended over the bed with her legs up and her wide-open pussy pointing straight down. See these straps, they kind of cradle her just above her ass. These other straps go behind her knees, keeping her legs spread apart and up out of the way. The guy is on his back on the bed and the girl gets lowered down onto his cock. He raises and lowers her pussy, up and down his cock, by spinning her around." She's talking fast and is clearly aroused by this idea.

"Jack, she can spin all the way around while his cock is inside of her. Can you imagine what that must feel like, her spinning around while they're fucking. I think it's the most erotic thing I've ever seen. We need to make one of these, Jack. I want you to spin me around while your cock is fucking my pussy." I can hardly believe it, but Lisa has it all figured out. She finds some straps from old lounge chairs, and we make the harness, hooking three ropes to it and looping them over the rafters in the garage. It takes us about a week to make it, and Lisa is ecstatic when it's finally done. Several times we get so excited talking about how the harness is going to work, that we shed our clothes right there in the garage and fuck on an old air mattress.

The harness consists of one large and two small loops, connected together by short straps. The large loop slips around the woman's back, coming up under her arms, against the sides of her breasts and connects to a rope above her head. The two smaller loops go around each leg, resting just above the knees, and are each connected to a single rope. The straps that connect these loops to the larger one, are short enough to ensure her knees are pulled up close to her chest. Finally, a solid pole about two feet long is connected between the knee straps to keep her legs spread apart. The three ropes are tied together just below the rafter. It looks kind of like a tire swing, without the tire. The idea is that when the woman is strapped into the harness and spun around, the three ropes twist, raising her up. When it untwists she is lowered back down.

We put the air mattress on the floor and hook Lisa into the harness. It takes several tries before she is at the right height and angle. At first, she's leaning back too far, then, her knees aren't pulled up tightly enough. She's naked, getting in and out of the harness and my cock is getting hard, just from watching her. Finally, it's just right. I spin her around a few times, twisting the rope to raise her up. I lie back on the air mattress, positioning my cock under her exposed pussy. Slowly letting the rope unwind, I slip my cock up into her pussy, as she spins back down. It's as amazing as it sounds. Even though we'd been fucking like crazy for the past two months, Lisa is still very tight and her pussy creates a lot of friction as she spins around my cock, like a corkscrew. As I grab her legs with my hands and turn her one full rotation to the right, she swirls up to the tip of my cock. Then I let her go and she twists back down to the base and keeps spinning back up my shaft. Lisa is in heaven.

"Ohhhhh yes, Jack! Spin me faster. This is fucking incredible! Keep me turning. Spin me back and forth real fast, Jack. Yeah! Just like that." Her thick cream is running down my shaft, keeping us well lubricated, as I keep increasing the speed of the rotations. It feels amazing and, because it isn't the straight up and down strokes that I need to make me cum, I can keep it up for a long time without climaxing. I keep spinning her back and forth, faster and faster.

"Shit, Jack! This is everything I thought it would be! My pussy is on fire!" She's panting and reaching between her legs to play with her clit. "I'm getting dizzy, Jack and it's just adding to the overall feeling. Can you believe it? I'm actually getting high doing this."

I'm spinning her so fast that I almost spin her off the top of my cock. Her pussy lips are just barely around the tip of my cock and her juices are gushing around it, as I twist her back the other way, screwing her down to the base of my cock. When she's completely impaled on my cock like that, I want to pump in and out of her, but she's pressing me down against the air mattress and I have no room to move.