no more sex until marriage

What do you ladies think about me asking my fiancé if we can stop having sex until we get married ! We already have a daughter together and we live together as well. I really want this, I feel it's never too late, am I selfish for this? Am I kidding myself ? We have no date planned to get married . Maybe this will open his eyes to how important it is for me that we get married. What do y'all think?