Sofia's BUTT JOB for Scott!

Bottoms up! The young model is officially part of the Kar-Jen klan now!

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Life’s pretty peachy for still-smitten kittens Sofia Richie and Scott Disick – especially now that the model’s reportedly plumped her posterior to please The Lord!

“He’d been dropping hints for a while about how she’d benefit from a larger booty,” a pal tells NW – and Sof totally picked up what he was putting down!

The couple recently jetted to Cabo San Lucas, Mexico, for some fun in the sun. But the vacay also doubled as “the big unveiling of Sofia’s new booty”, reveals the mole, who adds the procedure was paid for by Sof’s famous dad Lionel.