My brother and his partner separated last week. Apparently its definately over and both (from what I've heard and seen of fb) are pretty happy with the decision.
Last year, last april, they had a baby who sadly passed away 6 weeks later.

Heres my question: I know that if their little girl was still alive, there would be custody agreements and all that stuff. It would also mean that I would have had a relationship with SIL for the rest of my life, she is afterall the mother of my niece. But considering their little girl has passed away, does that mean that the ties between us are gone now because they have broken up? What would you do? What is expected in this situation?

Its weird because I really feel like we are losing my niece all over again. Its really really weird.

TIA