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Kylie Jenner, Tyga, NYFW

Craig Barritt/Getty Images

Since turning 18, Kylie Jenner seems to have grown up overnight. Whether she's moving into her own mansion or filming risqué music videos with boyfriend Tyga, Kylie has definitely grown up in front of our eyes.

But is she ready to get married?!

Fans began to speculate that the Keeping Up With the Kardashians star was engaged to Tyga Wednesday night when the rapper referred to her as his fiancée in a Snapchat video.

"I don't f--k with nobody," he said in the video. "It's just me, my fiancée and the dog I just got. I don't f--k with nobody."

But a source close to the family confirms to E! News that Kylie and Tyga are not engaged. It looks like Tyga was merely mocking an Instagram video that he shared on his own account that showed a man giving an interview in which he said pretty much verbatim what Tyga rehashed.

Could an engagement be imminent though? During the premiere episode of I Am Cait, Kylie revealed that she was just like Caitlyn Jenner's mom, Esther Jenner, in that they were both "married" by 17. Based on that comment, there's no doubt about: Kylie and Tyga are pretty serious. Despite the severity of their relationship, Kylie told fans via Twitter in late July that she wasn't "planning on getting married anytime soon" after Life & Style published an outrageous "Teen Bride" cover story.

Of course, everyone will be staring at Kylie's left hand from here on out, but pay no mind to those diamond bands she wears on that finger! She has been wearing the Cartier love bands for a long time, so everyone can rest assured they're not wedding rings. For now, Kylie is enjoying her public relationship with the "Faded" rapper.

"They are both in such a good place in their relationship," a source told E! News during New York Fashion Week. "Kylie turning 18 and getting her new place has opened up different parts of their relationship."

Tune-in to an all-new episode of Keeping Up With the Kardashians Sunday at 9PM, only on E!