Delivery room!!

So I need your ladies opinions... Long story short I'm going through a divorce living with my mom and little brother... I recently started dating a guy (I'm legally separated) .. So when it comes to the delivery room I'm due in November and today my mother and grandmother got upset when I said I didn't want my younger brother in the delivery room! They said as long as he stays at my head it's fine and a good experience for him etc! What are your ladies opinions? I feel weird about it, he will be 15... And another question have any of you just been dating someone not baby's father and had them in delivery?