Did m'y cuckold fetish prevent me to be hard for prenetration

I just married with m'y wife, she's m'y first Time and i'm her first Time From two weeks i didint get hard when i want to penetratz her (but it's ok when she handjob me) and m'y libido is 0, when before mariage i gooned 5/6 times a day in cuckold porn. I dont understand, i begin to think that it's because when i gooning i thinking about not penetrate m'y future wife Is that true ?! If i stop cuckold porn will be hard another time ?!

I will never tell to m'y wife this fetish