Collaborative sex stories let us write the plot together

(Medical Experiments, continued by RandomShadfan...)

“Doctor, it’s not — uuuuh — what it looks — ah — like!” Nurse Jenny groans, as you continue to pound into her tight, wet pussy.

“Then what is it?” Doctor Mandy asks, still looking shocked.

“The serum turned — fuck — one the patients — oh — invisible and he’s — urgh — fucking me from —AAAAH — behind!” Jenny pants, starting to reach her climax.

Mandy unbuttons her lab coat in answer and slides it down her arms to show a low-cut top and a thong. “I don’t know if you can hear me, but if you stop raping Nurse Jenny, I will let you fuck me in any way you want. She’s innocent! I’m the one responsible for this!”

Hmm… now what? Do you keep fucking the tight blonde who can’t stop messing with you or do you take the sexy brunette who is selflessly sacrificing herself?