so i was pre-drinking round my friend bernadette's house last night, as we were all going into town. bernadette has a slim curvy figure with big tits and a big round ass. i constantly stare at her big beautiful ass when ever i see her. but on this particular night she was wearing these really tight leggings that really showed off her big ass. it was incredible. after an hour or so it was just driving me crazy, i had all these thoughts in my head, like what that ass looked like under her leggings and what knickers she was wearing. i was getting so hard. so i decided to go upstairs into her room and look in her draws for her knickers. i couldnt find them but then saw in the corner of the room her dirty laundry in a basket. i put my hand in and pulled out the most incredible little black g-string. it had some pussy stains on them and i put them up to my face and smelt them, just taking in that incredible smell. i took the g-string into the bathroom with me and pulled down my trousers. i started to masterbate over bernadettes panties, imagining licking her pussy and ass hole. it was incredible. i had always wanted to take a pair of her knickers and wank over them. im glad i did.