Damn he is going to be late for Class AGAIN!! OOOPS I opened his door and for the first time I saw my Step Son pleasuring himself on his bed! Cock out, much larger than expected I saw it fully erect! I was a bit frustrated that his massive hard on was going to make him late him for Class and me late for tennis lessons. He really was having a tough time cumming and asked to see my tits to get off faster. Averse at first I did what I needed to do. I pulled down my shirt to expose my bare tits for him to stare at. I was shocked yet flattered that he felt seeing his Step Moms tits would help. Well it didn't because he STILL did not cum. He wanted more and more from me until he had had me completely naked touching my own pussy. I did begin to get turned on but I had to keep focused so he could finish up and we could get going. I stroked and then sucked on his huge erection until he finally exploded in my mouth!