Elder Brother Pushing Me To Get A Prenup Due To Father’s Estate Planning

I’m 24F, currently in NYC. My father is updating his will and there’s been some tension between my three brothers (29M, 27M, and 25M) and me regarding how things are being structured. My father owns a house in New York, a few rental properties in Chicago, and a vacation home in Florida. He’s still very much active and making his own decisions but wants to get everything sorted in advance

The issue is that he’s planning to leave the New York house to me while the other properties would be split among my brothers. My brother (27M) thinks this is unfair because the New York house is the most valuable and argues that I should either take a smaller share of other assets or that the house should be sold and divided equally. While my father is still considering his arguments, my second brother has also started insisting that I get a prenup before my upcoming marriage. His reasoning is that if I end up divorced, my husband could make a claim on the house, which would affect what he sees as the “family’s” inheritance

It feels odd that he’s the one pushing for it so aggressively when I haven’t even brought it up myself. It makes me wonder if he’s more concerned about protecting his own potential inheritance down the line rather than looking out for me

Can my brother challenge my father’s will later if my father sticks to his current plan?

If I do get a prenup, is there a way to ensure my father’s intended inheritance is protected without my brother dictating the terms? If not, what can I do here?