I know of some women who marry gays.They even have their own children. Some of them though may not know that their partner is gay. It takes time to know a guy is gay unless you've been exposed to different types of gaymen. YES!!! there are several types of them. And a lot of them are CLOSET. Meaning, they act like a real guy outside, but inside, they go crazy like hell listening to how Mariah Carey sings! =) I kinda not believe in bisexuality. Once a person prefer having sex with the same gender, I think that person's already a homosexual.

SO my answer is.... it actually depends on the woman's exposure to homosexuals. If she happens to have gay friends, maybe she can see some signs at an earlier point of their marriage.