Fuck-giveness.

You carry Jenna back up into the house, kissing and squeezing her ass until you drop her at the sliding doors to the kitchen. You push her up against them, kissing her neck and collarbone and peeling down the shoulders of her cocktail dress.
"James..." her voice is heavy with need.
"Yes...?" You kiss her bare shoulders, pulling her dress down to let her tits pop free.
"Fuck me... right here...." she pulls your head down into her chest. As you suck on her nipples, she gathers up the hem of her dress to slide her panties down.
"Right here? Against the glass?" you glance over her shoulder. It's dark inside, but you think you can make out Karen's form on the couch, still. "What if Karen-"
"I don't give a fuck... I need your dick right now!" she pants. Her hands are in your pants, fighting with your belt and button as you lick and nibble on her plump nipple. Your shorts drop, and she peels down the waist band of your boxers. She lifts her leg, and you catch her under the knee with one arm as you rub your tip against her slit. It's already dripping with wetness, an you rub for a few seconds as you look into her eyes.
"I love you."
"Take me, husband." she whines. "Fuck your wife." she says 'wife' as if it's the word 'slut.'
You straighten, plunging into her cunt, forcing her body against the sliding door, mentally hoping that it's strong enough.
"Ahh! Yes..." She grips your shoulders. "Give me that cock, baby..."
You slowly, deliberately and sensually fuck Jenna against the door for a few minutes. It's incredibly hot. Her tunnel is practically on fire.
"Jesus, Jenna, you're going to burn my dick..."
"That's what you do to me baby." She looks deep into your eyes. "Now stop fucking around and fuck me hard, James."
The growl in the back of her throat drives you crazy, lifting the hairs on your arms. You pick up her other leg, hoisting her off the ground as she hangs on around your neck, gasping.
"That's my husband...fuck me, stud." You pound, a little alarmed at the creaking of the door. As you look past Jenna, you almost lose your concentration. Karen is standing in the kitchen, staring. You meet her eyes, and all you can do is just smile and cock your head. She just shakes her head slowly, leaning with her palms on the countertop.
You let Jenna down. "Come here. Time to show you who you belong to."
"Yes baby. Whatever you want. I'm yours." You pick her up around the waist, hoisting her onto you shoulder and pulling open the sliding door. Karen drops out of sight behind the kitchen counter. As you carry Jenna inside, you finger her exposed snatch as you walk over to the living room. You drop her roughly onto the couch, and she moans, getting onto all fours. "I know what you want..." she purrs. She reaches back to pull her ass cheeks apart.
"Are you ready, baby...?" you whisper, spitting into your palm and rubbing our cock until it's slick.
"Own me." Her face is planted into the couch, and she grabs a pillow. She bites down on the fabric. As you press your spearhead into her tight knot, you glance to the side, Sure enough, Karen is watching. You shake your head at her, and push in.
"Rrrrrr!!!!!!!!" Jenna bites down, screaming into the pillow to muffle herself. You get inside.
"Fuck baby....so goddamn tight...."
"Ah...Anh....nnn...." she whimpers. "Don...'t.....don't go easy...Oooow.....fuck my ass baby...." she goes back to biting the pillow as you start to pump harder and harder. Her screams are intense, even into the pillow.
Within minutes, your balls are tingling and your prostate is swelling. You spit on her asshole and grip her cheeks as you piledrive her ass. She's grabbing your hands on her hips, and you switch to grabbing her hands, pulling her arms back and really driving deep.
"AWWW FUCKKKKK MY ASSS BABBYY!!!!!" Jenna screams, with no pillow to muffle her, and you wince. You hear, stifled, a chuckle from the kitchen area. You glance sideways to see Karen with her hand over her mouth. You wave your hand at her, motioning her to go away, but she just smiles and shakes her head.
"Bite the pillow, you buttslut..." you whisper, and Jenna puts the pillow back in her mouth before screaming. Her rectum contracts, and your balls are wet as they slap her cunt with every thrust. You bottom out, and shoot your load deep into her bowels. "Fuuckkkk...."

You fall back onto the couch, panting. You expect Jenna to collapse after that savage pounding, but she shocks you when she wheels around to put your still hard cock into her mouth, straight from her ass.
"Mmm...." she slurps up the cum that leaks from your cock, cleaning your cock from base to tip.
"Holy shit...you're a nasty girl..." you stroke her hair.
"No... I'm...." she starts, but then swallows. "I'm your nasty girl, baby."