I am becoming more concerned by the week. BD continues to show favoritism over one of our 2 children. DS 11 has Aspergers and bipolar. BD sees them eAch one eve a week separately and 7 hours together Saturdays. DS has been calling to come home early regularly which is allowed. BD takes DD8 to parks, mall and has met his GF. He buys daughter bathing suit and small toys. Nothing for DS. BD does not have a place suitable for overnights.(even though I gave him $70k in divorce settlement) DD is coming home from visits saying that BD says she can live with him. Both kids noticing the favoritism. BD WON'T answer texts or email about my concerns. refuses to speak to me in person. I don't know how this could be considered co-parenting. My next text will be asking him to participate in mediation. DS's therapist won't see us all together a as she can't remain neutral. Is there anything else I could be doing? I have a feeling May be asking for custody for DD only. I won't tolerate that. Advice please on how to protect my kids

Re: when to pursue more
This is a great response. It's such a good reminder for us all that we can't change anyone else's behavior or feelings.