Collaborative sex stories let us write the plot together

(Her Secret Fantasy, continued by Anon2...)

You can’t help yourself. You quietly slide your pants down to the floor, and take a seat on the lid of a porcelain throne. The restroom at your job isn’t an ideal place to masturbate, but with material this good it’ll have to do.

Your cock is already rock hard, so you quickly go to town. The thought of John cumming all over Rachel’s face consumes you, and even you’re surprised at how turned you are. The possibilities are endless, and they fly through your mind. Pictures of a titty-fuck like she gave him before, snapshots of his cum in her mouth… Maybe she could even let him fuck her…

This is the thought that sends you over the edge, but fortunately you have the presence of mind to aim for the toilet. You climb off, open the lid, and turn just in time, letting loose the largest load you’ve ever produced without assistance. You’re thankful that no one interrupted your jerking session, and even more thankful for your slutty girlfriend. But how far will you let this go?