Advice please 😊

This is my first baby and he is estimated to be born around 9lb 4oz. I’m 100% positive I want to breastfeed him, my partners mother on the other hand seems to think I won’t be able to breastfeed a 9lb baby as he will need more milk than I can produce and should also bottle feed him...won’t this cause confusion to him and also I don’t want to bottle feed with formula I want to breastfeed.🤷🏼‍♀️

Anyone had any difficulties breastfeeding a slighter bigger baby?

Or is the MIL just being awkward she has not been keen on me breastfeeding my own son since I told her, not that it has anything to do with her how I feed my child.