Porn is very dangerous for Marriage. The minute you watch Porn, demons get a foothold and they will attack your marriage from every angle.
Initially, porn may help your marriage but the very same porn will destroy your marriage.
It will also lead you to addiction and you will find it very difficult to overcome.
Ask God to deliver you and He will certainly help you.
It is better for God to deliver you than watching porn cos' demons will definitely destroy your marriage.
I will give you another option:
You must have family prayer at home cos' family prayer produces intimacy.