Well, you still don't know for sure how she took it. Just relax and try to be patient for her response. Even if she isn't favourable to the idea, it doesn't mean she won't come around. Lots of parents need time to adjust to this sort of thing. Yet, they love their children and do their best to support them. This is something you need to show you are serious about. So, if she tries to sweep it under the rug, actively seek out a conversation with her. Don't get scared, show your conviction to be who you are.