I doubt “Kay made here decision to leave right after the Tahoe shooting” mainly because if she had, Kay wouldn't have had the 'abortion' No need Why? What is the point?

  • As we'd debated before – abortion or miscarriage?!

on further review! of the Hotel Washington scene which still never fails to baffle! me that Kay was under the impression, she could just walk in and tell Michael
Quote
Kay: I'm not going back to Nevada I brought the children to say good-bye to you
and Michael would allow it Sure thing Kay take my children from me It is not an impossibility It was always going to happen....

I believe, Kay threw in the spiteful abortion to inflict [additional] pain “It was a son Michael a son and I had it killed” only after Extract:
Quote
Michael: I know you blame me [Tahoe shooting] for losing the baby....and you'll forget about this miscarriage and we'll have another child