DAY 18 - Step mom stuck in stairs watching on step son. Stepson fucks step mother and cum inside

Day 18. I woke up and while the stepson was in my room, I wanted to caress my pussy right on the stairs. When I finished, I was surprised to find that he was already in the kitchen and his dick was excited. My mind disconnected and I just took it and started jerking off his dick. I managed to stop it and went up to my room when I realized that I wanted to see how he would jerk off himself. Am I fucking stuck? Damn, he saw me looking at him...