how to know she thinks i was good or not in bed?

we've been talking for about a week and ended up having sex the other night. The attraction was mutual needless to say, I wasn't sure what she was looking for like a relationship or a fling. I don't have sex too often to be honest I don't think i'm bad though. The sex lasted about an hour and afterwards she asked me if i thought we were going to have sex and i said i honestly didn't know what to expect but didn't mind lol. Anyway I had work early in the morning and i had to leave but before I left we made out for 10-15 minutes at the door before i finally left. Is it safe to assume she enjoyed the sex? sorry if it seems like a dumb question, ladies care to give me your feedback?