Star Magazine claims Paris Hilton’s kid sister Nicky is fed up with the treatment Paris has received from family and media since being released from jail and has fled to Toyko to avoid her big sis.

“Nicky’s fed up,” says a Hilton mole. “She’s sort of lived in Paris ’ shadow her whole life, but seeing Paris treated like a coddled baby just because she was sent to prison is too much.”

“Nicky’s never been rewarded for being responsible,” the tattle continues.

“Nicky griped to her mother about how she always plays favorites with Paris , and that throwing a party for breaking the law wasn’t the best thing to do.”

Paris is reportedly oblivious: “She doesn’t get why Nicky is annoyed with her, but she has a short attention span,” says a source.

“People have been asking her if she’s been spending time with Nicky, and Paris just says, ‘Whatever – Nicky is doing her own thing!’”