Everybody else has already said it... and they're right. If this woman can cheat on her husband with you, even introduce his children to her lover, how could you ever trust her not to cheat on you? You say her children are fond of you... think how messed up those poor kids will be if they have any inkling who you are to their Mum. She's a very self centred, cruel individual, to play not only with the emotions of two men, you and her husband, but also with her own children's peace of mind. I know you're in love, but she's not. She wants somebody to validate her, to love her, but she doesn't seem to know how to return love. As a mother myself I'm just gobsmacked that she could parade her lover to her children like that, and feel no shame. And you only have her word for her husband's bad behaviour. If he's so bad, why does she stay with him? Do you want to be her little toy boy for the rest of your life? For her to take you out to play when it's convenient for her? What sort of a life would that be? Sneaking around, feeling more and more worthless every day that she manipulated and used you.

You're not someone else's convenient sex toy. Don't do that to yourself. As it happens, she's very unlikely to keep you hanging round for long... she got bored with her husband, now she's getting bored with you. Believe it or not, you're lucky. This woman is bad news. A bad wife, a bad mother, a cruel lover. You can do an awful lot better.