My oldest daughter (early 30s) is angry with me. She believes her recently engaged sister (late 20s) is in an abusive relationship and wants me to condemn the engagement. I have spent more time with my younger daughter and her fiancé than my older daughter has. I don't see any abuse. My younger daughter says she is in a healthy relationship and is very happy. She denies any abuse. I have to trust that I raised my daughters to reach out to me, or others, if they need help or support in getting out of a bad relationship. I don't think isolating my younger daughter by "condemning" her relationship would be helpful to her. I also don't think it is healthy for my older daughter to continue to voice unsubstantiated claims of abuse and at the same time offer her sister no emotional support, only condemnation. My older daughter is now voicing her opinion, via social media, to others in the family. This is very hurtful for my younger daughter and is causing a serious strain on my relationship with my older daughter. I cannot stand by one daughter without hurting the other one. What can I do to make this situation better?