Baby gender

Okay so I'm having a girl and I have ultra sounds showing that it's girl , my last ultra sound is at 26 weeks and I asked them to check her gender again and it was clear to see its a girl! But I have a older aunt who says my baby is a boy cause my stomach is shaped like a basketball , but I'm showing her the ultra sounds and she say that they don't mean anything , but my ultra sounds are clear its a girl . But the shape of my stomach didn't matter I thought ! What do y'all think ? Comment please