How should we share the news about us?

Hey guys, I'm searching for a little info and advice. My wife (34 MtF) and I (35 F) have been married for about twelve years now, and we have some awesome kids together. I've known since the beginning of our relationship that she is trans, but it's only been the last couple of years that she has decided to go through with the transition. I support her 100% and still feel the same about her as I did all those years ago. I have always loved her for herself and who she is, and I think I do even more nowadays because she's been so brave and so much more happy. It's made me wonder about myself recently, though. I hadn't thought about it much before, but then we figured maybe that means I'm bi. Now I'm wondering if I'm actually pan, because I love her for who she is. I'm attracted to her as a person, and her personality, not necessarily what she looks like. Is it more correct then to say that I'm pan?

Not many people know about my spouse being trans, and we're wanting to gradually start telling more people. I want to be able to spread the news to my mom, but I want to first tell her about myself and gauge her reaction to that first. I will of course wait to talk to mom about my wife until my wife tells me she's ready for it. My mom used to not be this way but she has been incredibly outspoken against the lgbtq+ community out of absolutely nowhere these past few months (she was incredibly accepting beforehand). Any tips on how to go about that?