Hi
Godisable#1Welcome to the family
I'm glad you reached out and sorry to hear your daughter is trying to destroy your relationship, having estranged her siblings with negative behaviours, some parent's are in similar situations to you, you are not alone.
Is your daughter living with you and your partner. Has your daughter a diagnosis, or aware things aren't quite right in anyway? A little more information can help parents know how to support you.
WDx