Perhaps take a break from family while you work through your own grief.

It also might not hurt to get back into therapy as you work through your grief.

It is different for survivors of abuse to process the grief related to the passing of an abusive parent or sibling.

Especially if other family members continue to traumatize the abuse survivor by sticking up for the abuser(s).

My resolution was to go completely no contact, but not everyone is willing or able to take that path.