Step-Mommy helps with assigment

Your teacher gave you a assignment to learn how to put condoms on and take a picture to show her. But the condom doesn't fit you, you sit their struggling when your step-mom said she will help you as your step dad has the same problem and has special condoms to fit him. She gets a huge surprise when she notices your step dads condom won't fit either as you have a much bigger cock than your father. You begin twitching as you feel her dainty hand and her wedding ring on your cock.