My hot sister in law moved in with us, under the condition that her boyfriend doesn’t. But he visits and sleeps over enough that he might as well live here. We just don’t have the room for all of his stuff and all of her stuff.

I work long hours and my wife doesn’t work. So she’s home with her sister and her boyfriend most of the time.

One time we are all on the couch watching TV when the movie ends and everyone runs to the kitchen to grab snacks. After a long day of work I don’t want to get up and just ask for yogurt. Everyone else leaves. When everyone comes back my wife and her sister are giggling and the boyfriend is carrying a tray of snacks. My wife hands me an open yogurt without a spoon and at the time I didn’t notice the subtle looks everyone was giving each other.

Not wanting to wait for a spoon and just tip the yogurt cup up to my mouth and slurp it down. It was warm, and sort of bitter at first. I wondered it was just regular vanilla yogurt but it tasted funny so I looked at the label. Plain vanilla, must just be because it was warm.

“Something wrong dear?” My wife asks me.

“Hmm, oh no I just thought the yogurt was going to be cold. They taste different and warm.”

I barely hear my sister-in-law say under her breath. “I bet it tastes different warm” but I miss the quick look from my wife. Don’t know what that was supposed to mean and I’m too tired to care really.

We begin another movie and I’m in my recliner and my wife is sitting on the couch with her sister and her boyfriend in the middle. Part way in they get a blanket and wrap it over all three of them. I don’t make it through this movie before falling asleep in my chair. When I come to, everyone is giggling in the kitchen. I get up and walk in and apologize for falling asleep.

“Don’t worry about it honey here have some ice cream.”

My wife pushes a bowl of chocolate ice cream in some milk with whipped cream mostly melted on top of it. My wife thinks it’s weird to put milk on ice cream and this is the first time she’s done it for me. I grab a spoon and dig in. Completely missing everyone, eyeing each other in silence.

“How is it?” my sister in law asks.

I shrug and say it’s fine. I don’t find out why she’s asking. My wife quickly changes the subject and they’re all talking amongst themselves.

That night my wife crawls on top of me and is aggressively trying to get me started. I’m tired but that little shut eye helped and I’m hard in no time. My wife leans in and asks if I want something up my ass tonight. She knows I like it and I suspect I like it more than she does but when we are doing butt stuff she at least pretends to be super turned on. But I cannot tell if she’s just humoring me. I shrug trying to sound noncommittal but inside I am willing. She rolls off me and grabs the big black thrusting butt plug and it’s remote. She lubes it up and squirts some lube up my ass. She loves that because it all the time makes me squirm because she uses a lot and it’s cold. I hold my legs up in the air and she starts poking my ass with the toy trying to discover the right angle. I guide her and she slowly pushes it into my hole and I release her hand letting her know she’s got the right spot and in nearly one stroke she thrust the toy deep inside me ass making my head jolt back and gasp hard.

“Oops sorry was that too hard”

I shake my head. It hurt a little but not too much. She smiles broadly and grabs the remote and turns it on vibrate before straddling me and taking my ever hard dick inside of her. She starts bouncing on me driving the toy deep into me.

“Can you feel it deep inside of you while I grind on your dick. You ready for me to turn it on so you can get fucked up the ass while I grind on your dick.”

I love it when she talks like this and I just nod. She presses the other button and the toy deep in my ass begins to thrust. I roll my head back and she grabs my throat.

“Does that feel good? Getting fucked by something big and black in your ass while your dick is inside me.”

I can only nod.

I spent a good long time grinding and bouncing and I’m panting as she turns up the intensity of the toy. We stop for a second to catch our breaths. So I don’t cum just yet and in the silence we can hear knocking and moaning. We laugh once we realize what it is. My sister In law and her boyfriend are having sex the same time we are.

We change position to me on top and her legs in the air. At a certain point I have to stop because the toy thrusting in my ass and my clenching to plow into my wife is getting too much. My wife grabs my ass cheeks and spreads them open.

“I bet she’s bent over right now. He’s probably driving his hard black cock in her ass as well. Can you hear it? The sound of his thrusts into her ass.”

The entire time she’s talking she’s grinding up at me pulling my ass open as the thrust black anal toy is fucking my ass automatically and rhythmically to the same beat as the other room.

“Are you gonna cum in me, while your bent over getting fuck in the ass with that big black cock.”

At that I cum almost instantly. I cum so hard I cannot breathe. I roll onto my back and try to fish the toy out of my butt. Before I can my wife grabs my arms and puts them above my head as she climbs on top of my face and tells me to suck it out. The toy is still rocketing away at my ass as I feel the warm juices flow from my wife’s pussy. I can taste it. My cum. Filling my mouth. I stick my tongue out doing my job and eating her wet pussy. Mentally confused about sucking my own cum into my mouth. I can hear my wife moaning and feel her whole body shuttering. She’s grabbing my hair and grinding into my face. I think she’s cumming. When she stops and tightens up and just hold there the only thing I hear is the electronic motor of the thrusting anal toy gonna town in my ass still. Then she rolls off of me and the first thing I do is reach down and pull out the toy. It took some doing after cumming. I was really tight. I look over at my wife and she’s curled up panting. We both fall asleep exhausted but not before she says I love you dear. I tell her I love her too and we cuddle and fall asleep.