Mother in Delivery Room

I'm having such an issue with my mother about her wanting to be in the delivery room. My fiancé and I are talking about having children a couple of years down the line and my mom chimes in (not jokingly) stating she'll be holding one leg while my future husband holds the other. Honestly, it makes me so uncomfortable, not her being supportive or even being in the room, she's just intensely dramatic...I feel in that moment the support and love would definitely be intended but I'd be so annoyed, uncomfortable and in such agony and she'd be so "extra". I'm truly not sure how I would handle that but I think it wouldn't be pleasant. I'd just like to know if anyone else had similar fears and how it can be handled. I've talked to her numerous times and she is hurt by it, I'm not sure what to do