I may be reading into this wrong but it sounds to me abit like the OW is trying to be a family and doesnt want your friends daughters to be so ''separate''. If everytime they came over dad and them went off to spend time alone, there would never be a relationship between the 4 children.
What happened with her father is different as clearly he chose not to have contact despite living in close proximaty, but with your friends situation I would think its a good thing (hard as it may be for you friend) that the OW wants to be there when your friends children come over.
My ex now has a new child to his gf/wife and my 12 yo is upset.
12 yo has not had any contact with her dad in 6 years his choice although she has told him she does not want contact, this mainly because he just does not care.
It was left to me to tell her about the child as he had posted it all over a social media outlet, he did not bother telling the other kids(adults now) thats how everyone found out.
He has did to my kids what he did to his 1st family. History is repeating itself all over again.
he and i argued over the 1st family as i thought(and still do) that the family should be told personally and that he should keep contact going,he has always argued that the 1st family has nothing to do with him and has told me often enough that his 2nd family has nothing to do with him as it was me that wanted children..
I find in my case that the ex has kept his promise that unless he has that family staying with him he decides that he has no family end of.
He splashes the cash when he has a family but refuses to do so when divorce rears its head.his attitude out of sight out of mind.
So sad for the families left behind but we have to get on with it, I myself have a very good relationship with my step-daughter and her kids(my grandchildren)so they still have extended family and all the kids together have a fantastic relationship with each other..
I just feel so sad the ones left behind like a piece of garbage
Father remarried after children in first family were adults. Impact of second marriage and having a second family has been on grandchildren. As he has "little kids" in his life everyday he has no interest in his grandchildren. It is a shame. It is really upsetting and has damaged his relationship with his kids, although he is oblivious to it all as he just doesn''t care as long as second wife and second family are happy.