This happened a couple of years ago, I was at a friends house working on a science project. There where three of us Ana, Marita and I. Ana is a really hot girl medium size boobs, great ass and great legs. Marita is not so cute but she also has a BIG ass.
Anyway the girls went to buy some stuff from the store near the house so I decided to watch some porn and masturbate, before I started enjoying myself they got back. So I stopped, but you could see my huge boner and Marita noticed it. I decided to go to the bathroom that's just across the room to finish masturbating, but I decided to leave the door open so they might bust me.
Ana called me before I could finish so I returned to the room still with my visible boner. I decided to go to the hall so I could finish and still get the adrenaline from the getting caught sensation, so I exited the room and started masturbating.
I went into the kitchen and there I pulled my pants all the way down and started moaning their names. I came all over the kitchen floor and Marita came in the kitchen just when I was adjusting my pants. That was my best masturbation experience so far.