Query her, Beckstah. What is the worse she can do? She takes YA, and I think by genre fiction she means adult SF/F and Horror. She's not going to shoot you.
Remember that Janet Reid advises writers to query widely. Sometimes, we just have to take that chance. Who knows? Some agents are not really specific in what they like. Genre fiction to me means adult genre fiction, unless of course the agent in question only reps children's and YA.