“Oh yes! Fuck me, Nick!” Susan yells, “Fuck me hard!” I’m pounding into her like a jackhammer. It feels so good to be fucking my sister and slamming up against her firm, round ass. Add to that the thrill of doing it in broad daylight, in the middle of an airport parking deck, and I’m almost ready to shoot my load.
“God you feel so good, Susan!” I pant. “I’m not going to last much longer.” I tell her, trying to slow the pace a little. Susan removes one hand from the car fender and reaches between her legs.
Looking around, I’m startled to see a young, twenty-something couple standing in the next aisle watching us. The woman is in front of the man, leaning against him. He’s got his arms wrapped around her body with one hand cupping her pussy mound through her shorts and the other massaging her tits. She has her head against his chest and is humping her pussy against his hand, as they watch us fuck. Seeing me looking at them, they both smile and she manages a little wave as he slides his hand inside the waistband of her loose fitting shorts.
“We have an audience.” I tell Susan as I continue to slow my rhythm.
“I’m almost there! Just ignore them and keep fucking me.” She says. “Don’t slow down!” Her arm is moving frantically as I pound into her faster and faster. “I’m cumming!” She yells, just as I slam deep into her, shooting my load in quick, spasmodic motions. Susan clenches her pussy around my cock, and her legs shake as she gushes hot cream around my cock, soaking my balls. I look at the other couple and the woman seems to have hit her orgasm too. Throwing her head back and closing her eyes, her whole body trembles against him and it looks like he’s holding her up so she won’t fall.
We stay like that, our chests heaving. Susan has both hands back on the car fenders as she gasps for breath. Susan looks up, spotting our audience, as the woman pulls her companion’s hand from her shorts and sucks his fingers into her mouth. Both give us a little wave and then walk away down the aisle.
“Jesus, it’s getting so you can’t get any privacy anymore!” Susan laughs as she wiggles her skirt down over her hips. “You have any tissues in your car, Nick?” She asks, opening the door.
“You’ll never guess what happened last week.” I tell Susan as we’re driving home. “I accidentally saw mom masturbating to a porn video.” I tell her, anxious for her reaction.
“You what?” She says, turning toward me with astonishment on her face.
“I came home early from Nicole’s last week and mom was in her bedroom, lying on her bed naked, watching porn, with a vibrator in her pussy.” I tell her.
“Oh my god!” Susan says disgustedly. “What did you do?” Susan asks.
“I watched her from the hallway; she didn’t see me.” I answer. “She looked really hot with the vibrator moving in and out of her.”
“Nick, that’s disgusting!” Susan exclaims. “You are really sick, watching your own mother like that!” This isn’t the reaction I was hoping for.
“What?” I ask. “Watching your mother is sick, but fucking your own brother, isn’t?” I guess I’ve been living in a fantasy world thinking Susan would accept what mom and I have been doing as normal behavior.
“Maybe that’s sick, too.” She says quietly, sitting back in the seat. “I just can’t help myself, Nick.” She says reaching over and putting her hand on my thigh. This isn’t going at all like I wanted it to. I know mom has been thinking about Susan’s pussy and I’m pretty sure she’s ready to make a move. Susan needs to be ready to respond to her. I try another tactic.
“You don’t think mom has a great body and has kept herself in shape?” I ask Susan
“I’ve never thought about it.” She says. “She’s our mother, Nick. You just don’t think that way about your mother.” She’s says softly, rubbing her hand on my leg.
“When we get home, forget she’s our mother and just look at her like a woman. See if you can understand why I say she’s hot, okay?” I ask, thinking that I’m going to have to use the transmitter to get Susan to come around.
“I don’t think it’s right; you watching mom masturbate, but I’ll look at her and tell you what I think.” Susan concedes. I decide to wait and see what happens. We’ve got all weekend.
Mom greets us at the door wearing tight shorts and a thin tank top, which barely contains her bouncing tits. Susan glances at me as mom embraces her, pressing her body against Susan’s and kissing her on the cheek. Mom holds the embrace, pressing her tits against Susan’s and running her hands up and down her back.
“Welcome home, sweetie.” Mom says, finally stepping back, her erect nipples poking out the material of her tank top. “Wow! What a dress!” Mom says, making Susan blush. “You must have had every man on that plane crossing his legs.” Mom laughs turning back into the house. Her shorts stretch tightly across her firm ass cheeks as she walks ahead of us.
“I guess.” Susan responds, hesitantly, raising her eyebrows questioningly at me. I nod at mom’s ass and raise my eyebrows back at her.
“What happened to mom while I’ve been gone?” Susan whispers.
“What do you mean?” I whisper back, knowing exactly what she means.
“She’s different.” Susan whispers again, checking out mom’s ass swishing through the door. “Sexier.” She confides. “She just walks around like that when you’re home?” She asks.
“Look who’s talking.” I answer, looking her up and down. “Who was the tease last month?” I ask.
“That was different.” She asserts. “I was just… oh no!” She puts her hand to her mouth. “You don’t think mom has the same latent sexual desires about you, do you?”
“I don’t know.” I answer. “It was you she was rubbing her tits against just now. Did you notice how hard her nipples were when she stopped?” I ask Susan, just before we walk in the house.
“Who’s hungry?” Mom yells from the kitchen. “I’m making sandwiches.” I turn Susan towards me and kiss her on the mouth, while I squeeze her ass checks. She slips her tongue briefly in and out of my mouth and rubs her hand over my hardening cock.