Secret Behind The Split! Kourtney Hired Sister Kim's Hulking Bodyguard To Spy On Scott -- What He Found

Kourtney Kardashian finally threw Scott Disick out for good just before July 4, but RadarOnline.com has learned she's been preparing for the split for weeks. An insider tells RadarOnline.com that the 36-year-old reality mom recently enlisted her sister Kim Kardashian's beefcake minder, Pascal Duvier, to spy on Disick, 32.

"Kim and Kanye gave permission for Pascal to take orders from Kourtney for a spell, and she asked him to watch Scott like a hawk," an insider said. "She tried the tactic of having Scott spied on before, but never over a sustained period of time."

"Kourt's done with Scott and upped the stakes to show him she means business," the source said.

Now, as RadarOnline.com reported, Kourtney is going for primary custody of the couple's children Mason, 5, Penelope, 2, and Reign, 6 months. Could she use information from Duvier to help her case?

Duvier, who reportedly scarfs down 18 egg whites every day to maintain his massive physique, has also worked for Kim's hubby Kanye West, will.i.am and Fergie.