Lucy reveals that she doesn't have any toilet paper in the apartment

Lucy leaves for a second and then comes back. "Sorry, Juvia. But I don't have any toilet paper left in my house." She said apologetically. Erza/Juvia was shocked. What was she gonna do now? Her butt needed a major cleaning immediately, but she couldn't stay in the bathroom all day. It was really starting to stink in there too!

What does Erza/Juvia do?