Hi, just hang on to the thought 'What kind of woman sleeps with a married man'
You know, when I was young and hot and single I wouldn't have ever needed to think of married men. There were so many single and attractive guys out there (not so much these days at 55+ but that is another story )
So in every way these women are losers. Helping to bring up another person's kids? While the mother is still in the picture? I don't think so.
Everything I have heard about these sitches tells me that it isn't the lovely little paradise they both hope for. And guess what - they can blame you!
As to the needing to be liked. This needs work. it is good to be a nice person, but remember the Katie Byron - Your business, other's people's business and God's business. Just keep your own side of the street clean and all else will fall into place.
It might be helpful to reflect on what in your upbringing caused you to need to be liked? Our self worth takes a huge knock when our spouse walks out, but we have to come back from this blow, although I admit it took me forever.