She's totally straight, its just not real to be in live with another woman who loves and understands you and you're wild about sexually who you feel a deep sense of belonging and comfort about.
Only real relationships like God wants are the hard work kind with a man you sorta tolerate and can kind of have sex with enough to have a kid if you just lay back and think of, um, nothing in particular. See it's the never really connecting emotionally or being aroused that makes it sacred.
Clearly you just don't understand heterosexuality.