About 2 days ago, my fiance and I were having sex and he said am I ready to have his baby before cumming in me..

Back story is i have a 6 month old son (not biologically his) he has a 9 year old daughter (not biologically mine). My son was always big and never was the small baby so I've been having baby fever again recently and telling him about it. He's been saying not right now, when the time is right we will try for another baby. Every time we have sex its always unprotected. I'm not on birth control either but while we were having sex, he asked if i was ready for another baby.

idk if he was serious about it or if I should ask him? I want another baby so bad its unreal.. Should I ask him about it if he actually wants another baby? Or if he said it in the heat of the moment?