It might not be intentional, but you never know. Sometimes I think they are just in such a constant state of being consumed with themselves and OW that they don't have the mental space to think about anything/anyone else. Like us LBS in the beginning, all we could think about was the WW, I believe its similar with them and OW. My W doesn't even have the patience for the kids much anymore even thought they were her life before, she still tries to make an effort to spend time with them but its a drop in the bucked compared to before BD.
Accept what is, let go of what was, and have faith in what will be