I had a doctor's appointment this morning. He diagnosed me with erectile dysfunction. He said I could not get a hard on unless I took the medicine he prescribed me. Mom comes in the room and I tell her what happened. She says that I cannot have erectile dysfunction, but if I do, she can fix it. She puts her beautiful mouth on my cock and it gets hard. Then she rides my cock and I am fully erect. She continues to ride me until I cum in her pussy!