Kylie Jenner might now be of legal age, but what has she been doing this entire time? That's what her fans are asking on social media today as her boyfriend Tyga shared a rather inappropriate photo of her on his Instagram account on Monday while wishing her a very happy birthday.

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In the photo, Kylie can be seen taking off her dress while baring her cleavage in the black-and-white shot. Tyga captioned the sexually charged pic simply with, "Happy bday to the dopest girl ever!"

 Happy bday to the dopest girl ever!

A photo posted by Tyga / T-Raww (@kinggoldchains) on Aug 10, 2015 at 7:41am PDT

 
Meanwhile, there's another report that says Tyga's birthday gift to his girlfriend - a $115,000 Mercedes Benz - was actually a hand-me down gift from his ex, Blac Chyna.

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According to Gossip Cop on Saturday, many fans quickly pointed out that Blac Chyna was seen driving the "gift' back in 2013. Jenner is sure to take this as an insult as she and Blac Chyna haven't been on the best of terms and have also been giving each other jabs about each other's appearances on their Instagram accounts for the last several months now.

The site writes, "Eagle-eyed fans first noticed that the license plate on Jenner's supposedly 'new' car matches the same one on a car Blac Chyna was previously seen driving. The vehicle, which is actually from 2013, is registered in Tyga's name, and he had given it to Blac Chyna in black while they were together."

The site continued, "Blac Chyna had it re-painted white and later pink, and apparently used it over the last two years, until Tyga recently made her give it back."

Tags: Kylie Jenner