Kylie Jenner Models Tyga's Boxer Briefs on Snapchat

The reality star is getting a lot bolder about her relationship with the rapper.

Kylie Jenner is getting a bit bolder about her relationship with Tyga.

The two fueled romance rumors this week when they were spotted grocery shopping, and now Kylie is wearing the rapper's underwear!

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The 17-year-old Keeping Up with the Kardashians star posted some selfies on Snapchat of herself posing in a pair boxer briefs from Tyga's brand, Crisp.

She captioned one of the pics: "Not doing sh**."

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Another indication that these two are an item is on Instagram where Kylie just changed her moniker to King Kylie in homage to Tyga's username, King Gold Chains.

While the 25-year-old rapper -- who has a child with model Blac Chyna -- insists he's just "friends" with Kylie, he has admitted his feelings for her. "I speak what I feel in my heart," he told Hot 97 in February. "I love her and I love her as a person."

Check out the rumored couple's cozy trip to the grocery store, below: 

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