Katherine offers you the back end

You can see the desperation in Katherine’s eyes as she tries to come up with something to score her some points in your trivial game. Is it the fear of punishment or the long running sibling rivalry that fuels her? Either way, she wants to win, no matter the cost.

Katherine reluctantly pulls herself off of you and slinks down to the floor, by your side. She looks like a sad puppy, not getting her treat. You brush her hair in a consoling gesture and tell her, “Unfortunately, you are the loser, Katherine.”

“Wait!” Katherine stops you. “Let me try one more thing.”

“What’s that?” you ask, curious what her last ditch effort will be.

Katherine gets down on her hands and knees and prostrates herself, ass in the air. She looks up at you from the floor and begs, “Please, take my ass…”

The sight of the beautiful twin desperately waving her ass at you while begging you to put it in seems to do the trick! You pull yourself off the couch and stand up. Your erection points out, ready to go. You bend down and press the tip of your cock against her button and slowly push the mushroom head in. You feel Katherine quiver underneath you.

Katherine braces herself as you start to inch your way in deeper. She is breathing heavily and her body is shaking. You hold her by the hips and ease your way in until you finally bottom out. The both of you breathe a sigh of relief. She feels so tight around your cock that you can feel your blood vessels pushing back, spreading her open. Each throb of your phallus causes her anal orifice to tremble and spasm. Then you start to thrust your hips. Your dick begins to glide in and out of her. She lets out a quivering moan as she is stretched out, impaled by your pulsating manhood.

If this were the first thing in the morning, you probably would have cum within minutes of feeling this tight ass squeezing your stiff cock, but at this point, it is a dull yet still pleasurable sensation. You watch your show and contently ram into your willing sex ****. She pants and moans, resigning herself to be nothing more than a toy for your perverse whims. You turn up the volume to hear the show over her high pitched moans.

After a while, you are absentmindedly smacking up against Katherine’s ass as you are engrossed with the program. Everyone else is distracted by the television as well when you feel Katherine start to pick up the pace. The steady slaps of her butt cheeks clapping against your waist soon become an applaud when she urgently swings her backside back and forth against your staff.

Emma is the first to realize what the urgency is about. “Time’s almost up!” she chimes in with an evil laugh.

Katherine backs herself on top of you and is planted on your lap, slamming her tight ass on your stiff dick. She pants and moans, desperately trying to push you over the edge. Her renewed energy does get you back into things. Your hands find her breasts and clutch at them as she bounces up and down over your hips.

“Come on… give it to me…” she begs, urging you to cum for her.