She should sell it all and give you half - that at least would be the right thing to do.
It's what I would do but I'm probably over generous at times especially when I feel blessed with unexpected abundance....Maybe the dad saw that his son was much further ahead in life than his daughter.
In the case of my Mothers estate she has made years worth of mortgage payments, taxes and other expenses for the 3 of my older sisters, buys their groceries, paid off gobs of their CC debt while 2 of them have barely worked in the last 20 years and the oldest has a 48 yo POS leech of a son who hasn't worked in over 15 years but lays around her house with his fat ass GF who he's now had 3 kids with all living in her house. I have never taken a dime from my parents other than a $1,000 wedding gift in 1990....
My brother and I are in agreement that we wish there was some kind of ledger where we could take that amount of money out of their share and tell them to pound sand....if only.