"I'd frak her" is better than "Just do her," I think. Maybe she should just go by Troy. It works for Big Barda and Raven.
OR she could cross-dress as Wonder Man. That way, any time the team is in danger from a seductress, just send in Donna. "Surprise, Poison Ivy! I'm a heterosexual woman!" It'd be like the Fastball Special. Only it'd be called the Crying Game Special.