Hello!

Welcome to PC and to the Bipolar Forum.
I am very sorry about your heavy heart.
I know I often also experience a heavy heart when it comes to dealing with family. Your problematic sibling sounds a lot like one of mine. Constant problems. My sister/family does not even know I live with BP. They know I deal with other illnesses and this sibling is very judgmental/critical of me.
I am sorry your daughter has been influenced by your sister.
I think, yet do not know, I might try to work on my relationship with my daughter first and foremost. Do you think she might be open to a heart-to-heart talk?
NAMI has some family educational groups. Do you think there is a NAMI group in your area? If so, might you daughter consider attending?
I am glad you are here, reaching out.
Please do make yourself at home.
I hope to read more of your posts.

WC