Hi m-and-m,
Oof. That is a hard blow. Can you remind us what age your daughter is? She will likely continue to show signs of psychological/emotional stress. Have you looked at this article on
typical reactions of kids to divorce? This might help you understand how stress shows up in kids (it apparently differs by age). How well she adjusts will depend a lot on how you guide her through this, like validating any feelings she may have. That can be hard when/if the kids (especially younger kids) start to show signs of bonding to the other partner.
When my ex began dating, it seemed to stabilize him. Unfortunately (in some ways, not in others), that didn't happen until year 4 post-divorce. I think the axe swings both ways when a new person shows up. If the new guy is a decent stable person, he may provide some level of protection.
I'm sorry this is coming up so early. It is a kick in the gut at the relationship level, and a second one when there are kids involved. How are you holding up?