Posting this on behalf of a friend who is upset by a situation she is in.
She has one child with her ex, they never got married and were together for about 2 years. He split with her and moved on quickly and went on to have 2 more children and married the women he had two kids with.
How he treats the children is so different. He will do anything for the two children he lives with but he hardly does anything with his child with my friend.
She’s really struggling to understand why he doesn’t bother much and what she can do to make him more interested.