Been in those shoes - I say if one has children from a former marriage, they should not get re married as the men always have a jealous row in that situation as those children are not his kids and some men act like children and do not want to share his love. That goes for women too who walk into a package deal.
Not good, I had walked out over 20 years ago and it still haunts me to this day and my Son is still feeling the pain of those measly four years I tried to mend the marriage.
Not good and nothing will change, many sorry's said, but next day, next month it will be the same as before. If the Children are hurting it is time for The Mother or Father to stand up for their own flesh and blood, so there are no life times of guilt on anyone's shoulder. I lived it
been there and still suffering.