a Masterbating Husband

My husband likes to wait till he thinks I am fast asleep and start masterbasting. At first I really didn't mind it at all,it might have been a once a month type of deal. But, recently in the past 2 months or so it has been every night. When he first started it was a turn on for me, I thought he was trying to get an erection to have sex with me; little did I know he was pleasuring himself to the point of no return. After he ejaculate he roll over and go to sleep. Here I am left upset and wondering what's wrong with me, or what's wrong with him. Why is choosing his hands over me to make him feel good.