My husband has a son from a previous relationship- we just had a baby on Sunday and people are asking is this our first?

My husband has a son from a previous relationship- we just had a baby on Sunday and people are asking is this our first?

I’m not disregarding my stepson but I feel like “yes this is me and my husbands first baby together”

But he usually interrupts me and says “not mine, this is her first”

It makes me sad and I don’t know why...is this postpartum?

Yesterday he said I’m not holding the baby’s head right and she stretched and her head came out of my arms... that made me sad too. Maybe I’m over thinking all of this idk.

But what’s the correct answer to that question?