WHAT’S THE DEAL? GWYN & MARTHA HIT TOXIC LOW IN SEINFELD WAR

Jerry and Jessica have been getting an earful from Paltrow, an insider spills

- 

POT-STIRRING Gwyneth Paltrow is gooping up Jerry and Jessica Seinfeld’s longtime friendship with Martha Stewart — and upending the summer social scene in the Hamptons, tipsters tattle.

Insiders dish Goop honcho Gwyn, 49, is desperate to hobnob with the comedian and his cookbook author wife — and lure them away from competing lifestyle mogul Martha, 81.