My stepson is coming home from class and is in a good mood. He saw his stepmom in the kitchen making dinner and wearing a really hot tight skirt. He showed her the new challenge on the internet that girls do. First on is called the 'tiktok doggystyle virgin-PRO challenge'. I said that’s what they call advanced and PRO doggystyle poses? Let me show you how it really looks like. I go on the bed and I start with the poses, He stutter and ask if I can show it again from behind this time. I do again from the beginner to the pro position! Okay that’s enough young boy! I turn around and just see his huge boner through the pants. I ask maybe i should let you see a bit more of the PRO doggystyle pose? I turn around and say wait maybe I even have a MASTER position. I spread my legs, my tight skirt goes up slowly 'oopss'. I slowly put my thong to the side and says I need your big dick inside me to cum. He fucked me so hard that we both cum pretty hard and fast