First of all, we didn't tell our kid (12) about my "i don't know when to be ex" wife's sexual changes. He's been told that she would live separatly from now on, that they would be spending time together and so on.
She's been lost in herself for some time before, so it was not a shock for him. The most important is that his living place stays the same, he goes to the same school and may do his daily things the same as before.
Why we chose not to tell him everything? Cause nobody knows for sure. Who knows, what inner thoughts drives my ex wife? Maybe she's straight but lost, maybe she's bisexual or lesbian, or a unicorn. What we know for sure, she couldn't stay with me, living together. Exactly that information was delivered to our kid.
It's not his problems, he doesn't need to solve them.
I don't know if we were/are doing this right. Actually, i don't care (have no time for that, neither see the point) about that. There is no ideal escape from this situation, i think.
And i don't expect to do the best i could. I would fail for sure, she would definitely fail too. Just trying to not feel pressure for that. Chasing for an ideal family or ideal divorce mirage would make just more pain for everyone.
Actually there're not much changes in my interaction with son. Doing what we were doing before, talking about the same things, making fun, watching movies or goinging for a walk.