Look, it's just not realistic for Marigold not to be sexually attracted to Hanners, for the following reasons:
1. Marigold is a regular visitor of 4chan. On 4chan there are traps. It is impossible to look at a hot trap and remain completely heterosexual.
2. She is a fan of Yaoi, as well as anime/manga in general. As I stated earlier, this makes it extremely unlikely for her to be straight.
3. She is viewing yaoi with Hanners. As someone else stated earlier, this is equivlant to two adolescent boys viewing porn together. If they're straight, they're not likely to experiment with each other. If they're not straight, (which, as I've established already, Marigold is astronomically unlikely to be), however, then they are almost certain to sexually experiment.
4. Angus is a horrible, horrible, smarmy dick, so Marigold is seeking comfort in another female. This is likely to lead to sexual activity with her.
5. Hanners can't handle semen, so if she has sex, it's with a girl.
I'm sure there are other factors I'm neglecting to mention, but they all lead to one inevitable conclusion. It would be more likely for a tornado to rip through a junkyard and leave in its wake a fully assembled 747 than for Hanners and Marigold not to make love.