Healing my Cousin

My cousin broke his leg and i agreed to let him stay with me so i can take care of him, i check on him and realized he took too much of his medication which causes some rather strange side effects, like hyper-erections and delayed ejaculation. i check and notice he is hard, i cant resist and hop on his cock, i ride him till i cum but when i try to get off his cock it gets harder and throbbing inside, i cant resist and fall back on his cock and keep ridding him till i cum again.... im so shaky from coming twice i nearly stumbled off as i was leaving his room.