I find it interesting that many posters are using words like 'fishy', 'rat', and 'sneaky' to describe the girlfriend's motives. It could be that she simply likes the idea of a MMF scenario or finds something else about the situation arousing and is either unable to articulate it or is embarassed to do so. It's not like most North Americans have open and honest conversations about sex without hang-ups. I wouldn't attribute 'negative' motivations to her without knowing more. Now, if she wants to get him drunk and have her friend take advantage of him or pimp him out as a CD prostitute, okay, that would be shady, but I want to give people the benefit of the doubt - when I'm not being a cynical misanthrope. :D