Stealing girlfriends sisters **

So, my girlfriend is 19, and my girlfriends sister is 23. My girlfriend is currently staying on her sisters property in an RV. One night my girlfriend, her sister & her sisters husband all went to a concert together. I got pretty ** while thinking about this but was too shy to do it. About an hour goes by and I decide to sneak into my girlfriends sisters house, go through all of her **. Clean & dirty. I smelt all of her dirty **, I came in a clean ** & put it back with her other clean ones. I took 2 home with me too ;) It was so hot seeing all of her thongs & G-String’s that touch her ** everyday.