Last night she came home claws out, accusing me of trying to turn S8 against her.
Mine has done the same. I looked her straight in the eye and replied as calmly as I could asking "why would I do that? Our son needs his mother." Then I left the room.
Not sure if this helps or not. But it worked at least once for me.
Me: 45 W43 S7, Foster S9 (Planning to adopt post divorce) D mentioned Feb 2015, Wife served 3/24/2015. She moved out 4/15/2015.