She knew she should stop, at least for a minute to make sure no one heard that, but she couldn't. Right now it was physically impossible for Ivy to stop from fingering her pussy to the idea of Anna going down on her. It was such a vivid fantasy that it made her hate herself, but she still couldn't bring herself to end it, or to try to imagine Brian fucking her instead. All she could do was add a second finger and bite down on her hand as she gasped in pleasure from the added stimulation. Her two fingers still weren't as thick as the only cock that had...