Oh, Lord! Scott, Kourt & Sofia's Wild Sex Contract

It seems three isn’t a crowd in this krazy hook-up!

Fans were left wondering “WTF?” when Scott Disick was snapped out on the town with both his girlfriend Sofia Richie and babymamma Kourtney Kardashian twice in the last month – most recently dining together at hotspot Craig’s in West Hollywood on November 16.

But it turns out things are even krazier away from the cameras – with sources telling NW the trio have been enjoying secret sexy trysts. Yep, Scott’s having his cake – and eating it too!

“It started as a whisper, but now everyone in their inner circle is convinced this is what’s happening,” an insider tells NW of the threesomes. “Kourtney’s at her sexual peak right now and loves trying out new things, and Sofia’s willing to do anything Scott wants to keep him turned on.”