Too true. Even in real life. It's a weird place to be, when your role in the group has been "She's the girl" and suddenly there's another female. Suddenly there are two of you, and the male majority lumps you together and expects you to suddenly be more girly. But really the only thing you have in common is that you're both awfully butch.

When there's one of you, you're an individual, just like any man in the group. You negotiate your friendships with others in the group, on an individual basis, and you're an equal. When there are two, you're a minority, a type, a group within a group, and the group is reaching out to eclipse your individuality. What now? How do retain your sense of self, when you're part of a struggling minority?

It would make a good plot for a story. Though I don't know if it's an SF story.