"I Had Sex With My Husband’s Brother"

Dear Readers;
"My husband and I have been living together for about four years and have been married for three years. We have a daughter we both adore.

But when I fell in love with him, I was going out with his younger brother. It was a relaxed relationship and we never discussed marriage until his brother came along. I know we hurt him badly when we got married but he always told me he wanted me back and that he’d always love me. Unfortunately, there have been days when I’ve felt that leaving him was a terrible mistake. He was a wonderful man and treated me like I was special.
About a year ago, my husband and I had one of our steamy rows and I ended up having sex with his brother. It was mind-blowing. We’ve since been sleeping together but my ex is now seeing another woman and I’m feeling jealous.
I still care deeply for him but going back to him would hurt too many people. We’ve stopped sleeping together because this new girl is always in his flat! I feel so empty, especially knowing I can’t really have him.
What do I do?"