Let's be realistic... she already has her money.
She may simply not be all that interested in running a sports team.
If no one else in the family is, then sell it to someone who will care and who will do the right thing. That's better in the long run for all concerned.
Really, Guardian Glass was Davidson's life's work. The Pistons were more like Davidson's toy race car.
I've been wondering about Ethan Davidson, an actual performing musician at one point, getting involved with the concert venues. His wife does music too:
http://www.myspace.com/ethandanieldavidson
http://www.myspace.com/3238122