Know it all

It's a new relationship between my friend & I, & her & her boyfriend came over last night to hangout with my fiancé & I. I started discussing with her something my best friend said that shocked me. It was about how she seemed to already regret having her baby (not born yet). My new friend knows that my fiancé & I are trying to conceive but simply bashed on the idea of that to me. My fiancé & I live in a large studio & she said to me, "you wouldn't want to have a baby living in a studio, that's not good. Babies are expensive. You don't want to have a baby when you're still in the honeymoon phase of your relationship." 
Apparently she knows it all? Any thoughts?