I'm sure from her angle you are the bad guy. I'm making no accusations here, but your mom wants to see you do what you like to do. In a sense it's like painting a portrait that ends up in a museum but you don't want your parents to go and see it on the wall. I place my vote with the others, you might feel awkward because you know someone that's seeing you or whatever, but just don't forget where your real concentration should be. Your performace. If you think about who's watching you more than what chord comes next then you're kind of apting yourself for a mistake or two. All I can say is it's not nearly as bad as you think.