Blac Chyna & Jaden Smith Instagram Flirt!? Tyga's Ex-Baby Mama Sparks 'Teen Dating' Controversy, Kylie Jenner 'Booty' Revenge [PHOTOS]

Before hooking-up with 25-year-old "Rack City" rapper Tyga, "Keeping Up With The Kardashians" youngster Kylie Jenner was allegedly involved in a short-lived "teen romance" with Jaden Smith. The two were very close friends a few years ago. Back in July 2013, Miss Jenner wished the aspiring actor a very "Happy Birthday" with this sweet Instagram message:

"Although we can't remember exactly when we met, I couldn't be more grateful that we did. You understand me like not many do and you always know the right time to make me laugh. And no, you haven't failed once to catch me when I attempt to walk or open the door on my every entrance. Happy birthday to my best friend."

Pretty cute!

But things eventually turned sour once 17-year-old Jenner started dating the older hip-hop superstar. Things are actually getting pretty serious - but 16-year-old Smith obviously does not approve of the couple:

@officialjaden: "You Turned A Pretty Girl Into A City Girl #Ashamed."

Ouch.

But maybe the infamous Hollywood offspring shouldn't be one to judge... because he's currently "flirting" with Tyga's (ex) baby mama on Instagram! And controversial music video vixen Blac Chyna is simply supporting such cyber affections!

These viral screenshots were recently posted on bossip.com. Apparently, the Kauai crooner is enthralled with Chyna's eye-popping "assets." Oh, and he thinks her baby son's cute:

So, how does the brunette bombshell respond?

By following Smith on the popular social networking site - duh:

Maybe this is all just innocent "flirtation," but still...

Chyna just received a sweet gift from her "new bae" - hopefully not Smith because he's definitely not old enough to drink champagne!

blacchyna: "Bae knows me too well."

Wonder if Tyga's jealous, especially now that his kid might be involved? And whatever happened to Maino...

Stay tuned!