Gray Matters

SIBLING RIVALRY Graham and her brother compete for the same girl in Gray Matters, a coming-out comedy that may have audiences wishing they'd stayed in

Heather Graham, with her quick, laughing charm and her sunstruck beauty, has mismanaged her career as badly as any actress, but doesn't she at least deserve a tartly written commercial chick flick? Instead, she's stuck in fodder like Gray Matters, a tee-hee precious Omigod-I'm-a-lesbian! comedy. She and Tom Cavanagh play brother and sister, who behave like platonic boyfriend and girlfriend — until they both fall for hot zoologist Bridget Moynahan. Graham makes the coming-out dithering bearable, but not before she has jumped through hoops of contrivance. C-