Baby sex

So my bf and I have spoken about having a baby he doesn’t want to until he’s 30 and married he says. Me on the other hand but rather be in my mid-late 20’s like 26ish. We didn’t disagree. However during sex the other night my bf whispered in my ear if I’m ready to be a mummy. I was soooo shocked but I said no instantly because I’m not ready and I’m sure he just got caught up in the moment and didn’t want to pull out. Atleast I think so 🤷🏽‍♀️ when I asked he just said lol shrugged but he wouldn’t give me a straight answer or doesn’t want to talk about it. We’re both 23.