2 children enough?

I've always wanted to have a big family. I already have a pair though. First born was a daughter and then a son. Most of my husband's friend told him that he should stop making any more babies because in chinese they believed that having a pair (1 girl, 1 boy) are considered good luck? I wanted at least 3 children but my husband told me that 2 is enough 🙃 We're currently in our 20's and I thought that this is the right time to make babies because by the time I turn 30, I don't intend to get pregnant anymore. How to get my husband to agree?