Who's Kylie tryna tease with this sexy selfie?!

Ms. Jenner posted her last thirst trap of 2019 the other day -- the makeup mogul in bed, rumpled sheets, in a bra and undies. Presumably she was sleeping alone ... but dreaming of being in bed with someone?

At the same time, baby daddy Travis Scott, with whom she shares daughter Stormi, was giving an interview to XXL magazine professing his never-ending love for Ky. Well, duh ... when a girl looks like this, guys rarely fall out of love, right? The rapper told the hip-hop mag, "I love her [Stormi's] mommy and I always will. The hard part about relationships is just trying to be in one without a million outside voices interfering."

Still, the two have been spending time together, having been spotted over the Thanksgiving holiday together at a local casino near momager Kris Jenner's desert manse where the family celebrated together and then again at the family's Christmas party at Kourtney's Calabasas home where the rapper was seen in photos with the likes of Migos rapper Quavo and Tesla/Space X honcho Elon Musk.

So maybe Trav and Kylie aren't so broken up after all? ...