You know that I know what's best for you, don't you baby? Come to step-mommy and let me make you feel good..
Your step-mom just came over to visit for the first time since you left the house. You're all grown up now, on your own, becoming a man, dating a girl.. she just dropped by to see how you were doing and starts asking you questions about your love life. It's not long before she gets you to confess that well, you're not really being satisfied by your girlfriend.
She coos to you and tells you not to worry, she's make it alright. Obviously your girlfriend doesn't know about you and step-mom, how she would take care of you when you were living there, and says she knows that nobody compares to her. She reaches down and starts playing with you, and of course you don't do anything to stop her. You missed your step-mommy didn't you? Tell her all about it while she makes you feel good.
She tells you to take off your pants. Since your girlfriend isn't doing the job, step-mommy is going to be the one to take care of your needs. Don't worry it'll be your little secret, and if you're lucky, maybe step-mommy can pay you a lot more visits in the future!