Sex with a younger man

Okay I feel like I can dicuss this without ridicule. So, Im dating a younger guy he's 26 Im 35. He doesn't have children, but i do. I have four that are a little older and can do for themselves, and 1 that is grown and doesn't live with us.We have been dating for 8 months. I want another child but he seems to be against it. We have both been married and he says he doesn't want children by a woma. That has children, so should this be a deal breaker or should i give him time to change his mind. He has stated that he could change his mind in time...what do you ladies think?