Race and even species wouldn't stop her from getting laid. Think about how many rural guys have experimented with animals. I mean, there's even a law on the books in West Virginia forbidding guys to copulate with animals below a certain size/weight. And history has shown us that even if a people is considered inferior or the "them" in the "us and/vs. them" that doesn't stop the "us" men from copulating with the "them" women for whatever reason.
And for all we know, Raine was probably getting it with Kratos. Or someone else in power so she and Genis would be "pure elven" on the books and wouldn't be outed as halfbreeds for the labor camp.
VIDEOGAMES ARE WEIRD.