dude i may be just lucky but i have been there numorous time and didnt get busted, if you play it right its all good but i have been busted a few times , of course if you get caught you still have her freind cause obviously they wont be freinds anymore, if she is hot do it man. but i will admit when i banged my ex girls freind and then came home and banged my girl freind like 20 min later i felt a little bad for a little while.