Stop and listen to what sis has to say.

You don't want to hurt your sister's feelings, so you stop as her hand slides over your ass. You know her well and know that she is turned on by watching those two going at it. As expected, she leans forward and whispers hotly in your ear.

"Fuck that bitch, little brother. I want to see you give the slut the fucking she obviously needs."

"Yes, sis." you say with a wicked grin.

You walk up behind her as she looks at Adam. You know she is trying to decide if she wants to suck his cock, too. Which is probably as dirty as the rest of him is. Before she has a chance to decide, you pull your cock out and lift her skirt. There is a moment of surprise at her seeing her pantiless ass bared to you, but you don't want to give her the chance to pull away before you can do what you have in mind. So you quickly slam your cock into her dripping pussy and grab her hips so she can't pull off of your large, throbbing piece of manmeat.

"No! Let me go, Blair!"

"No! You know you want this, slut. So just enjoy the hard fuck you're going to get from me."

For emphasis, you pull your cock out, then slam the entire length back inside her. Unconsciously, she lets out a loud moan of pleasure. Then, realizing what she did, she tries to deny it and convince you that she doesn't want it.

"No, Blair. I don't want your cock inside me. Please don't do this."

"You don't, huh? Are you sure?"

Again your cock slams into her just like before and again she lets out a moan of pleasure. Her will is weakening under your commanding presence. You know she will give in with a little more encouragement from you. So, instead of waiting for her response, you pull all the way out of her hot lil pussy. Then you shove every hard inch into her tight pussy in one stroke.

"Unnnnh! Oh, gawd, Blair! Yes! Give it to me! Fuck me, you well-hung bastard!"

"Mmmm. I plan on it, slut. Now bend over and suck Rudy's cock like a good little girl. Can't you see that he's hard again?"

"Oh, gawd. Yes, Blair! Mmmph!" she says as her mouth engulfs his cock once again.

A grin spreading across your face, you thrust in and out of her pussy faster and faster. Your eyes are locked on the little bitch sucking on the bus driver's average sized cock as you hear a soft moan from beside you. Turning your head to your left, you see your sister fingering her wet little pussy as her other hands kneads her tits through her thin blouse. She is obviously turned on by watching you fuck Janet like a bitch in heat while Rudy thrusts his rock hard cock down her slutty throat.

"Do you like watching me fuck this bitch, sis?"

"Oh, gawd, yes. It's so fucking hot, Blair. Is her pussy nice and tight? How does it feel wrapped around your thick cock?"

"It feels wonderful, sis. But why don't you come see for yourself how tight she is? You can lie on the floor under her and watch your baby brother slide his cock in and out of her warm cunt."