I'm a first time poster on here but I couldn't not reply! This is some where comical and sad! First of all, I can see why, she doesn't trust you. After all, your on here trying to figure out how to hide stuff! Lol... secondly, you start this forum suggesting it's about your "friends"... when in all truth it sounds like it's not about your friends at all.....
So here's my suggestion.... let her go and find a real man who is not willing to lie on behalf of some outside females casual conversations. If you don't have anything to hide, why hide it...... then you won't need to worry about hiding anything, problem solved!