I did agree with her that the point was valid. We have mediation Tuesday, and she's still randomly seeing this one dude as far as I know, so R isn't on the table just yet.
I believe the only reason she's acting this way now is because the D is getting close and my atty has taken steps to make sure she can't pull any more dirty litigation tricks, and she doesn't like that our S will be living with me (even though she says it's ideal and he's currently living with me).