Almost Caught... SeXStoRY

So this was about a year ago, and was the closest i've ever come to getting caught. (I have not been caught yet) I was on vacation with my f****y, and I brought along a freind of mine I had been "getting acquainted" with. So we find the opportunity to release our feelings after a week of entrapment, everyone is out of the house except for my s****r who is still sl**ping. So we start going at it, first she gets on top and does her thing and gets the O, then we start going at it doggy style, and I mean full one doggystyle. Moaning, hair pulling and spanking. While we're doing this i'm on the verge of cumming so i'm getting ready to pull out, when....I hear the front door to the apartment open, and hear a voice. So i pull out and cum all over the room as I am running to hide in the closet. Then i realize that she should be the one hiding since i'm in my room. So i tell her to say i went for a run and she took my room since she didn't want to sl**p on a pull out. So i'm in the closet now still cumming on the floor, and she walks outside and tells the little lie. So we wait a bit and everyone leaves except for my s*s who had woken up in the middle of everyone being home. So they are out there talking while i'm butt naked in the closet. So i put on some running clothes and sprint into the bathroom saying "I have to pee!!!" i then splash water all over me to make it look like i ran and was sweaty. After that, i jerked off the rest of the week.