Percy
You had a father, didn't you? Take your lead from that. Just be supportive, love. It's the best thing you can do. Let her work around you, but just ... be there for her. Follow her lead, don't push, and hold her hand if need be.
I know you're not her father yet. I'm not Harry's mother yet, but ... I can still work out how to be a mother. You're a bright man, love. You'll work it out.