Kid I’m babysitting told me something and shocked me

So I’m babysitting a kid my mom babysitting and I during the week. As I’m babysitting me and the kid I think he’s about 3-4 I can’t remember exactly but we’re just sitting here watching a movie he’s climbing all over next thing I know he tells me there’s a baby in my tummy!!!! Like what I’m 19 my boyfriend 20. His mom isn’t pregnant far as I know! I mean I want a baby really bad but me and my boyfriend want to wait a little longer. I don’t my boyfriend he goes

It’s funny all bc he started explaining. Like yes babe we have sex I know how it works but it fought me off guard. Like he’s mom had a miscarriage at 21-22 weeks but it was months ago. The kids young he never asked about Baby cooper. Just crazy makes me want a baby so much more!! 😭😫🤰🏼🤱🏼