DE NIRO’S DARKEST DAYS

ODDFATHER DROWNING IN DIAPERS & LAWSUITS

WEARY Robert De Niro’s messy court battle with a former assistant is creating chaos as the aging movie mafioso and girlfriend Tiffany Chen struggle to cope with their newborn baby and the actor’s advancing age, sources say.

As his 80th birthday hovers on the horizon, the Godfather legend is sinking in a legal swamp after suing his former corporate vice president Graham Chase Robinson, 37, for plundering $6 million from his company, Canal Productions, and getting slapped with a countersuit, which is about to go to trial.