I'm really bad at being introductory, but the one thing I really wanted to point out that Lorna and Wanda are super-awesome-mega-friends. I would expect that Pietro probably has access to her powerset due to the fact that she's been hanging with them for years. It's up to you just how much he has. If you'd like to work out their dynamic, let me know? Lorna is 22 so she's like the annoying little sister that's been hanging out with them for no damn reason, but you know she totally cares about them.