Quote: The information I receive is from SIL. She is close with him and tells me how the family is very frustrated with OW since she doesnt help at all with the baby and wont get a job.
That's what I'm trying to say. Your SIL does not like this woman and will continue to cut her down. You don't really know how your ex feels about her. You can't know his thoughts.
You've explained a lot of the reasons leading up to the M problems, but what are your solutions? How will you not treat your xh (if you were to get back together) or your bf the same way? Do you have a more open view on sex now or need to work on this? Would you be able to get along better than your parents and how would you do that? T