I’m equally confused by it, as are the therapists she’s spoken too.
Yes basically she knows it’s wrong to not show care and that she needs to show empathy. She’s had friendships in past breakdown because of it.
If she hadn’t learned the masking then yes, she’ll change subject or find a way to avoid them.
I think the overwhelming is from the effort she has to put into mask, and when she later tries to understand. She has a tendency to go over stuff again and again afterwards, and questions if she reacted in the right way and said the right things. At times that has caused her to spiral.
With me, I know she’s masking so I think she feels like she doesn’t need to now (because it’s not like I can walk away completely now) - at least it feels like that, and as unhealthy as that sounds.