How about something like:

No thanks. Right now I want to reduce our contact so I can move forward. Of course we can link up by phone/email for anything about the kids.

T 13 M 7
Me 48 H 46
SS 15
BD 7.14 PA
D final 5.16 (H filed)

We receive & we lose, and must try to achieve gratitude & embrace with whole hearts whatever of life that remains after the losses - Dubus