Death may have knocked Brooke Astor down, but it certainly didn’t keep her out of the fight. In the inheritance battle between her son, Anthony Marshall, and her legal guardians, Astor’s mental capacity has been called into question once again. Now Annette de la Renta and JPMorgan Chase, who took charge of her affairs in the year before her death, allege that she was unfit to change her will as early as age 98. Marshall, who stands to gain millions based on codicils signed after that, disputes this. He points out that she was older than 100 when doctors ordered her to “cut down on late night dancing and parties.” (And here we thought being 100 was all about pooping and People’s Court.) Marshall also claims that De la Renta bought the support of Astor’s staffers when she wrested guardianship away from him and fired one long-term housekeeper who wouldn’t turn against Marshall. It looks like all parties are settled in for a long fight, which should be fun, as Marshall himself is 83 and De la Renta is 75. Being rich and old: not so easy as we thought!