She's not gonna give it up!

Pregnant cosmetic queen Kylie Jenner isn't on maternity leave just yet ... the makeup mogul is posting selfies to promote her newest Kyshadows Lip Kit colors and more but she's sticking to tightly-cropped pix of her face -- no voluptuous 7- or 8-month pregnant chest in these photos!

After making a clearly ridiculous claim that X17 Photoshopped our EXCLUSIVE pix of the 20-year-old's baby bump as she hopped onto a private jet to take off on a girls' trip to celebrate her mom Kris' birthday, Travis Scott's baby mama is still concealing more than facial blemishes -- this girl's flat out pretending she's not pregnant!

But her Snapchats tell a different story ... just look at what she's been eating as of late! Uhhh ... pregnancy cravings, anybody?