Fun Morning

Robin cleans house for a customer of mine and today was her day. Robin isn't hot but she is good looking enough to want to fuck. So I'm working and the customer leaves. Robin is in the kitchen cleaning and she gets on the phone talking to someone I figure its time to rub one out while I can hear her. I drop my shorts down around my ankle's spit on the steel hard one eye snake and start to fist fuck myself. I love pre cum mine or someone else's it tastes great. About 3 or 4 minutes of stroking I shoot my gooey hot load on the floor. Then I finish working, clean up my mess all but the cum on the floor that I leave for Robin. I wonder if she will know what it is???