I was reading your text conversation and don't you think from the texts from my exh that I forward to you they sound the same? Same words, same tone...strange.
I think he will do this more often than not. Sad for K, but I would be very leery about her going with him with all those other kids and dogs. OW nor your H seem like they are very good parents.
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!!