Replying...
Intro. You are at home in your room only with your girlfriend kissing and playing ... You are still virgin but you are willing to take the step. At that moment your stepmother arrives and listens noises from your room approaches and catches you ... He looks at the scene from outside with the door open a slot, watching how lost you are but in the end he decides to enter to help you and teach you.

Madrastra

@Daniel Pérez