'Yes, we will have a secret and no one will ever know about it,' I whisper into Catherine's ear, holding her by the head with one hand and caressing the lower part of her belly with the other. Her hands do the same. I come rubbing her clit as fast as I only can. Catherine gasps and closes her eyes, giving in to unbearable pleasure. Suddenly I feel I can no longer keep myself in. I am coming! Boy, why did I masturbate?! Catherine pushes me hard against the side of the stall and continues working on my clit with her face pressed against my chest. I look down and see her staring at me, admiring the faces of pleasure that I'm making. When she feels my body relax, she puts both hands on my head and makes me go down.