Wanda & Matt
I would have liked to meet him—your brother, I mean. If he was anything like you, I'm sure we would have gotten along well.
Don't worry about it. From what I've been able to read, it was a terrifying time of uncertainty and no one should or could blame you for looking after your family. Certainly not me.
Well, if it helps, I won't actually be able to see it in the traditional sense, so you can surprise me just fine. (Even if you really don't have to.) I'm no parent, clearly, but maybe frame it as, "I'm really proud of you for wanting and trying to help people, but as your mom, it's my responsibility to keep you safe and healthy and I can't do that if you go off on your own. I love you both so much, and together we'll figure out a way you can use your powers that allows me peace of mind."