This sibling rivalry sets the bar pretty low.

Foxy Brown and her brother were slapped with dueling federal indictments yesterday.

Gavin “Pretty Boy” Marchand was allegedly caught up in a scheme where cops say he swiped $8,000 in goods from the Hermes store on Madison Avenue.

He faces up to 15 years in prison for allegedly trying to use a bogus MasterCard to buy birthday-party duds.

In Brooklyn, Foxy, whose real name is Inga Marchand, was indicted for criminal contempt for allegedly violating a court order that barred her from contacting a neighbor.

She allegedly cursed at and mooned Arlene Raymond on July 21.