Sex for pleasure in marriage

Hi guys, so, I am in love with a girl and she is in love with me as well, but the thing is that she is catholic (and I'm christian as well but I'm still not sure about being evangelical or catholic, and I don't want to talk about the differences and the rules here because I know about these things and this is not the focus of this discussion)

What I am asking here is suggestions of what should I do considering the sex theme. Because for me, I consider this an important thing in the marriage also considering that the idea is to stay together forever, but I also know that catholics understand this discussion in different ways inside the religion and I don't want to have more than 2 childs. So, what tou guys think I should do in this case? (Sorry if I've not been so clear, my english is not perfect😂)