Rodolphus didn't come back to the cellar or whatever damned room she was tucked away in for a very long time. When her stomach could no longer stand being empty, Hermione forced herself to eat the food that was still waiting on the tray. For all she knew, it was the last time anyone would come back to feed her. Maybe she'd pushed him too hard. Clearly the man wasn't stable. She should've been gentler in her approach. Trying to wind him up to the point of being overly emotional rarely did her any good.