Honest opinions please..?

I have this married friend or you can even say it's me I don't care. Anyways she's married w/2 beautiful kids, nice home, nice cars, doesn't have to worry about paying bills and ect. She and her hubby have been having their troubles for years now. She's told him she's not happy and he doesn't try to change. Well for the past year now she has been talking to an old boyfriend. Now mind you he lives a thousand miles away, and at first I didn't see any harm in them just talking. Well she meet this homewrecker twice and had sex w/him once. She came clean to her husband about sleeping w/him, but yet she still talks to the ex. I'll admit I"m a little jealous, b/c I don't understand why she's acting the way she is. She says she can't leave her husband right now b/c of the kids, money, home and ect., but she says she also can't stop talking to the ex. She says the ex gives her so much more than her husband. She says she can be herself around the ex. I don't understand what she's gaining from this "relationship". Just the other day she and the ex where joking around and he ask if she would get mad if he dated someone else. Which she told him no, she said Im the one thats doing wrong not you. So she acknowledges that she's wrong but yet she says she can't let the ex go. Do you all think she is in love with the ex? How do I tell her to drop the ex and get happy with her husband? No judgements, she is still my friend. She know's she is in the wrong. I just want to help open her eyes.