Do you drink? You could get liquored up before the show to lube up the situation. When you drop her off, be talking with her, get some kino going, move in slowly while you're talking about how you had a good time and smoochies.
Man, she could have copped out on you easily with the "my mom is in the Hospital, I can't make it". Like she's some kind of doctor and only she can help her mom. geez, I would think her mom would want her to go out as well...
Some girls have no idea how it makes guys feel when they talk about hot guys. I'd wait until I was banging her before I brought it up
side note: I HATE it when bytches do that. I don't drool when I see hot girls or even talk about it. It's self-centered and insensitive.