This one is pretty much a porn story. Very simple setup with the action starting pretty quick. Woman is home from work. Her husband isn't home. She has lost the spark with him. She notices her stepson is home from college. She starts getting excited. Once he turned 18 their relationship changed. They became more flirty. More lingering touches. She is pretty sure he feels the same way. She goes into the house and is about to pass his room but doesn't hear the music she normally hears when he is home. She is going to knock but instead cracks open the door and peaks inside. He has headphones on and is looking at the computer. She wants to know what he is watching so she sneaks into the room. She then notices his right arm moving.