My DH recently had an epiphany and realized that he has not been a parent all these years to SD's, but instead tried to be a friend -mainly because he was terrified of BM and of losing the love of his daughters.  He has begun to set healthy boundaries with them, as well as his sister, who recently got suckered into defending SD21, aka the sociopath. SD21 wanted to come over to our house for Thanksgiving and see her sisters, but she is banned from our house due to her lack of apology for many of the disrespectful things she has done to me.