Welp, it's official!

Scott Disick and Sofia Richie aren't hiding their relationship anymore... in fact, they're flaunting it! The Lord shared some steamy Snaps of himself planting a smooch on the 19-year-old, and we're sure Kourtney Kardashian is speechless. Are these two really a serious couple? It's just SO weird!

“Kourtney thinks this fling with Sofia is a little weird, but nothing shocks her anymore. Kourtney just wants Scott to be his old self. She shares three kids with him, so she'll always want the best for him and will always make sure he's happy," a source dished to Us Weekly.

The two had a "Congratulations Scott and Sofia" cake in front of them, but why? We doubt they're engaged just yet, and we'd be in shock if she's pregnant, but we guess anything is possible these days! Now that he's on the outs with the K clan, it wouldn't be a bad idea for him to have a kid with Lionel Richie's daughter.

LD certainly has a thing for rich girls!