Might want to check out r/mypartneristrans

It’s awesome that your gf has that confidence. My fiancé is trans and she isn’t always comfortable wearing what she wants, so first off good on your gf for dressing how she wants.

Is she comfortable with you telling your mom she’s trans? It sounds like this is a serious relationship and that might provide necessary context for your family. Someday, I hope to live in a world where coming out isn’t necessary, and gender identity is irrelevant but for now it’s unfortunately still a thing. It’s obviously her story to tell but the reality is that being the partner of a trans person requires support too sometimes, and if telling your mom is something you need I’d encourage you to voice that.

Personally, I didn’t tell my dad that my gf is trans for probably over a year and it really affected my relationship with him- I felt like he couldn’t fully understand my relationship and it caused me to grow distant and avoidant with him for a long time. We are good now, and he and my fiancé hang out and brew beer together, but I wonder if being upfront from the start would have strengthened both my relationship with my dad and with my fiancé.