I still think you should revisit letting him have K overnight. She sounds like she isn't handling the change of routine well and he is such a flake anyway.

Hope you are doing ok.

Me: 46 FWS: 36
Married and Divorced 4/07, Pregnant 7/07,False R 7/07
Baby Girl born 3/08
Kicked him out because OW: 7/08
5/10 He realized what he had and lost.
Moved home! REMARRIED 3/14/11!!