Three-way foreplay

As we enter our bedroom, she points to a spot in the middle of the floor.  I know not to argue with her, so I kneel where she wants me and I turn back to face them.  My mind races as I watch them undress.  How far will she take it tonight?  Will he go along with it?  Will she let me stay?  Before long they're both down to their underwear.

She sighs softly as he kisses her neck, one hand on her hip while the other finds the small of her back.  He glances my way, suddenly wary of my presence, sizing me up.

"Oh, don't mind my husband," she says dismissively.  "In fact, it's best just to pretend he's not here at all.  He'll just watch, I promise.  Isn't that right, pet?"

"Yes, ma'am." I reply.

She turns his attention back to her.  Their hands wander and explore each other's bodies some more as I watch from my knees.  I notice the bulge growing in his briefs.  

Apparently, she does too as she places her hand gently on his erection.  She slowly feels its entire length as their mouths meet in a passionate kiss.  

She retreats from the kiss with a wicked grin on her face.  Whenever I see that look, my stomach knots up and I feel uneasy.

"How would you like a blowjob?" she asks, looking him in the eyes.  "I bet you'd like a nice wet mouth on your cock right now.  Hmm?  What do you say?"  Her massaging continues, as does the swelling of his package.  I suddenly know where this is going.

"Yeah, that sounds great," he says in a breathy whisper.

"Mmm...your cock is so big.  I can't wait to feel it in my pussy," she teases.

"Uh," is all he can manage as her hand continues it's motion.

"Hey, what do you say we put your cock in my sissy's mouth before you fuck me?  I promise, it's perfectly fine.  Doesn't she look beautiful dressed as a woman?  She has such an amazing mouth.  Just imagine how great it'll feel.  Will you do it for me?"

"Well...," he says hesitantly.  "I guess we can give it a try, but I'll stop her if I don't like it."

"Deal," she says.  She turns her head towards me, while still fondling the front of his shorts.  "You heard him, Alison.  Now crawl over here and let's see what he's got.  I want him nice and slick when you're done.  Got it?"

I nod once and start crawling on all fours.