This is really an opinion thing, but here goes. If she is truly a lesbian and is not just curious or bisexual, then I think you need a divorce, as this would make you incompatible on the most basic level. Can you see yourself married to a man? Also, I don't think you should be offended if she is a lesbian. I would not see it as her using you, she obviously did not want to "come out of the closet" and needed a husband to keep up her charade, and she loves you enough (though not as a husband) to select you for that job. Or she may not have known she was a lesbian at the time when you were married.
If she is bisexual or curious, then this means she is capable of loving you as a husband and your marriage is worth saving. If you don't want her to have sex with other women, then you need to express this to her. I would not recommend threesomes, however, as this almost always leads to jealousy and would only hurt your relationship even more.
Answer
You would decide, after long deep conversations if you two want to remain together despite the differences in sexual orientation. As Ask Abby says, "would you be better off staying together or being apart?"
of course xD
no because she was a lesbian
Yes they can. It doesn't change anything, as long as your attacted to girls, your a lesbian.
When one lesbian loves another lesbian very much, they often deedle each other.
If you are sexually aroused by women.
Yes if she is a lesbian.
Divorce her because she could never love you the way you love her.
You could just be friends with this Lesbian for a while and then she may fall for you, not her current sexual partner.
who ever says its odd or weird to fall in love with lesbians or with the same gender its not odd its how they feel about the person its about the love they share :)
Yes, it's possible, just like a straight man could fall in love with a lesbian woman.
Yes, for some ex husbands it is possible for an ex wife to fall in love with her husband or, she may have never stopped loving him.
Nohe did not,but he did fall in love with many girls!