Supporting a friend through her relationship break up

I had a work colleague whose husband had an affair so their relationship broke up. She was brokenhearted. Trouble was he still kept coming round to see her, sweet talking her. This went on fir some years and she was not able to even begin to get over the break up.
I always thought he wanted the best of both worlds while he enjoyed his power over her.
That’s it really. Some men just like their cake and want to eat it too. In the end she saw sense and started to feel stronger as she got more confident.

Do not offer advice one way or another as it may affect your friendship. Support her. You can always say "that's a hard decision you have to make." Listen to her and you could reply by summarising what she has said and asking her what she thinks she should do. You could suggest she draws up a pros and cons list then number the points in order of importance but don't try and persuade her one way or another

I am not sure how much you can do, except deciding how much exposure you want in this situation

It is up to her to get out of her denial - it is her call to make the best decision for herself, not between him and her

I would say as little as possible and not try to influence her decision, although would want to say that she will never fully trust him again.

If you are negative about him or the affair and they get back together you will be seen as a bad friend, if you support her with going back and it is miserable, you will be the bad friend.