If your D is upset about this I have a feeling she'll have no trouble in telling her Dad how she feels about what he did.
The MLCer sees nothing wrong with the way they handle things. They feel they are entitled to do whatever they want with no regard as to how it will affect anyone other than themselves. They are very insensitive and selfish.
Has the ow introduced her children to your H?
My kids have made it clear to H that they have no interest in meeting ow. The only one to have met her is the oldest one and that is only because it was unavoidable due to work related events. Otherwise they have clearly let him know that ow is his life, not theirs. Doesn't stop him from mentioning things they have done or are doing as a couple in front of them though.
I'm glad you had a good evening with your friends!