X demands full custody because I'm now engaged

[sleeper]

Answering a few other questions raised....

Kids LOVE fiancé. DS began callng her "mom" after engagement but we have stopped that. DS often asks if we're going to fiancé's house cause he enjoys playing with her kids and generally being there. DD loves fiancé too, suggested I marry her saying I'm always happy when I'm around fiancé.

X has done nothing but try to find fault with fiancé from the beginning. She criticizes her patenting, her children's behavior, what the eat (it never ends).

Barb, as to your "type" question, fiancé and X are the same physical appearance type. Although I do see men (and women) attracted to the same psychological or behavioral types. Seems as though they're usuall similar or the opposite of the opposite sex they grew up around (mother/father).