I think this is a retarded question and it only belittles yourself if you let others know your relationship is like this.
She clearly isn't happy with you and if you even have to ask this question you must not be all that bright.
Maybe you suck so bad in bed you are turning her Gay or maybe she wants pussy over meat.
Only she knows what she wants and even if she was Bi it will never work out or go issue free.
I have a great relationship with my wife. If she wanted to have a semi-open relationship in the bed, I wouldn't feel "belittled" by it. I wouldn't make it a habit to have that kind of relationship.....