Just to play the devils advocate...
Simple. Wait for your wife and kids to go out of town and hire a prostitute so there’s no commitment and you can live out your fantasy. Not saying I’ve done this or that I would, but it’s an option. I know everyone is gonna hate me for saying this, but you probably won’t get caught unless you do something dumb.
Many of my guy friends have used prostitutes while married/in a relationship and nothing has ever come of it.
The vast majority of member on this site will always look down on the rest of us from their moral high-ground because they think it makes them look/feel good. But in reality (I hope) we all know life is a little more complicated.