You are not selfish Maria! This is a need, a part of you as it is for many others here.
I think you are facing a serious problem as it would only be human to start to resent the intrusion into this part of your life after so much time.
It’s not about your love for your wife or her love for you, it’s the sudden change to a life style you have enjoyed but more importantly needed for many years.
She is bound to notice the change in you as you get stressed out and the only way I can think of to help the situation is to tell her.
If you don’t tell her the pressure on you will rob you of your happiness and put a strain on your marriage and yet telling her could harm the marriage also.
A difficult situation with no easy answers.
