How would you feel?!

So me and my fiancé where having great amazing sex the other night.. so he knows I’m not on birth control so sometimes he pulls out and other times he doesn’t.. which is fine we know what can happen.. but we never talked about kids yet properly like we both no we want them at some stage.. so anyways while having sex he was like “Let’s make a baby” I laughed a little cause it’s so not like him then he goes “ I don’t care if you get pregnant babe” so after sex I start messing with him saying lol you have baby fever and he’s like laughing but says nothing more... so what should I do? Or say?