That moment you realize you've taken a casual Coachella hookup and made it into something way bigger ...

Jaden Smith is back in LA -- out from under the neon lights and smoky, dusty haze of Coachella -- with a mystery lady he reportedly hooked up with at various parties around the desert music festival. We spotted the new couple at the Calabasas Commons, on Monday, is a serious makeout sesh on a bench outside. The curly-haired brunette leaned in for the kill and Smith willingly obliged as the pair went out for lunch and kombucha in the early afternoon.

All of this, as Smith has reportedly broken up with Fam actress Odessa Adlon. Those two had been dating for almost exactly a year. And then there's Jaden's supposed ex Tyler the Creator whom the young singer SWEARS he was dating. He told fans at Ty's Camp Flog Gnaw concert: "I just want to say Tyler, the Creator is the best friend in the world and I love him so f–king much. I want to tell you guys something: Tyler doesn’t want to say, but Tyler is my motherf–king boyfriend, and he’s been my motherf–king boyfriend my whole f–king life. Tyler, the Creator is my f–king boyfriend. It’s true!” He even confirmed the relationship to X17 in THIS video.

So who's this new love interest? Tell us in the comments if you know her!