I know that that's a "I'm having such a good time and am out enjoying myself without you H" dig, but I'm wondering if her coming round could be a good idea.
Do you? Not trying to be a smarta$$, but you are mindreading here. That may be it. But, she may be uncomfortable and assume you will bring up the R. She may not know how to handle it.
The invite is out there. It's up to her to decide what to do with it. Just let her decide. And be there for the kids if she decides she can't.
No pursuit. You are fine whether she says yes or no.
