Last Night's Mistake

I was on a shift and she walked in, my girlfriend's friend. We'd talked flirtatiously before, but last night everything changed. One moment we were chatting about work, the next her hand was inside me, feeling me up right there in the break room. I couldn't stop it, I wanted too much. She found a way to get me off while pretending to be concerned for my health. We both knew what this meant: nothing but regret.