Samantha Ronson has been urged to dump girlfriend Lindsay Lohan – by her older brother, Mark.
Super-producer Mark has reportedly told his little sis to end her romance with Mean Girls star Lindsay – because he believes the pair don’t go well together.
A source tells the News of The World newspaper, “Mark doesn’t think Lindsay is right for his little sister.
“He’s really protective and is pressing to end it for good.”
Lohan, 22, recently took to her MySpace blog to deny rumors she and Sam had split.
She wrote, “RUMORS.. little piece of TRUE information: we did NOT break up!
“Access Hollywood, Extra, etc, every tabloid, Page Six… AND every GOSSIP website. Get your stories straight please. It’s really annoying to have all of your friends emailing you saying, i saw, i read, etc… NOT TRUE.”

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