I thought id share my fantasy with you, im 21 my girlfriend is 19 and haqs nice long legs dark hair nice body. My best mate has always said how he would like to have sex with my girlfriend and when he told me it turned me on so much that i mentioned it to my girlfriend during sex. What made it even more horny was that i know that my best mate has a large package very large infact. i would like to organise a visit to my friends house one saturday night, my and my gf would get dressed at mine and she'd wear a mini skirt high heels. I would take a bag with some cans of larger in, i would hide about 4 cans round the side of my mates house, we would go in and get chatting. Then after a few cans of beer id say i was going to the local shop and would be back in 15 mins. I would walk to the back of my mates house and my gf would try it on with him whilst i watch through the window. and then when they finish take the hidden cans and knock on the front door. perfect