Oscarum monstruoso;5123960; said:She wont break up with him, she will realize he has a spine and she will respect him more and treat him better. Besides if she leaves him because he wont be her doormat he is better off.
I think you're taking this the wrong way. I see it as she is trying to enjoy his hobby. I really don't think it's crossing any lines or being too demanding to request that she gets to have a fish in his tank.
I'd create a list of fish that would work and then have her pick, I think she might get a kick outta that.

