i (37, bigender/f) have a wife (37mtf). now i guess she has always been my wife. even as a teen, she identified as trans before detransitioning. she wanted to join the girl scouts, too as a kid. i feel like as the wife of a trans woman, she has always been a woman. however, we are so used to her being a guy. i have heard many stories such as “it’s awkward for me because my dad is now my mom” or “i refuse to call my ‘dad’ by ‘his’ correct pronouns and ‘he’ is a trans woman”, stuff like that.
our three kids have always been very supportive of the lgbtq community, though, knowing we are and 2/3 of them being lgbtq themselves.
Not sure of their ages, but they sound like the kind of kids that would be accepting of the situation. I would treat it like its totally normal while also acknowledging the societal challenges, and making sure to hear their perspective and experience with it