Me (34) and sis (40) were visiting over at moms for xmas. Mom was cooking up a holiday meal, but realized she had to get some stuff from store, and also just wanted to get out of the kitchen for a quick walk in the neigborhood. We told her we'd watch the stove and she said she'd be back in like 20 minutes from the store.

As she left the aparment me and sis rush to the window which faces the street to make sure she had left the building. I peek out the window waiting for her to walk out the building as i begin kicking off my shoes. My sister standing behind me regularly asking me, "do you see her"."is she gone yet ?", as she kicks off her shoes as well.

Suddenly I see our mom walking out of the building, casually strolling up the block. We know she wont be back for at least 20 minutes, but time is still an issue. "ok, she's gone.she's like half way down the block sis" My sister barks back, "lets go, we dont have much time and have to do this quick"

We both tear down our pants and underwear shaking in excitment and nervousness. The rush of time making it even more frantic. We know we dont have much time so leave our sweaters on, and just naked from waste down.

My sister now rushes over to edge of the bed now naked from the waste down, with only socks and a sweater on. She jumps quickly on to the edge of the bed with a tube of KY in her hand, swings her legs back, and begin applying a small dab between her asshole. I garb the tube from her and begin applying a small amount to the head of my cock as she pulls her legs back panting in heat waiting for me.

She pulls her legs back and barks at me to "lets go". I begin pushing my stiff cock against her asshole until it suddenly and rapidly slides in her asshole. "uuuhhhggg", as my sisters back arches and she tenses up. Both are now shaking in lust and nervousness.

My sister barks at me, "do it.hurry, we dont have much time" as i begin pumping her briskly. Both of us clinching each other feeling each others sweaters as grips, but bare skin below.

I begin pounding my sister rpidly as the KY allows for rapid and easy pumping. Pounding deep to the base of my cock my sister presses her hips up to take it all.

The sound of xmas music on TV in other room, deep breathing and grunts, and the slapping of my hips of my sisters ass is all that can be heard. (slap, slap, slap, slap, slap)

We both yelping at each other during, "hurry, faster, harder, go.go, we dont have much time" the rapid pounding of sibling anal incest going off. As we bark harded at each other until the point when i feel myself cumming. My sisters saying, "do it.do it.go.go.hurry"

As i begin to cum my sisters grabs my bare ass and presses myself into her, and squeezes her legs down. Every inch of my cock is now in her as i pumps out cum. We lean up to look at each other as I begin spurting into my sisters ass, both with angry expressions and teeth clinched.

We lay there pressing hard against each other for a few minutes staring at each other gripping on to each others sweaters. After about a minute she looks to me to ask if im done, which i tell her i am. She made sure to take every drop in her ass so not to leave any stains for our mom to see when she got back.

I slide out of my sisters ass and we both scramble to find our underwear and pants and frantic begin getting dressed. We rush around in a panic making sure our clothes and bed is straight. She rushes back in with some air freshener just to kill the smell of sex in the air, we rush back into the living room. We sit down on the couch just as our mom begins to come home, trying to calm ourselves down back into the holiday calm.