Uh oh! It looks like Kylie Jenner may get her heart broken in 2016.

According to a new report, the 18-year-old's boyfriend Tyga cheated on her with a Brazilian model named Annalu Cardoso, whom he first met on the set of one of his music videos.

RELATED: Tyga Posts Cryptic Message After 14-Year-Old Accuses Him of Sending "Uncomfortable" Messages

"Tyga is very careful and waits until Kylie is out of the country," a source says of the 26-year-old's infidelity.

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A post shared by Annalu 🦋 (@annalucardosod) on

A second insider explains, "He would text [Annalu] and ask how she was doing, casual conversation. Then he started asking her to send pics and to meet up. They hooked up a couple of times, but for the most part they would just hang out."

But the duo never talked about Kylie. "[Annalu] never wanted to ask because [Tyga] was acting like someone who didn’t have a girlfriend, so she thought those were just rumors," the insider tells Us Weekly.

RELATED: Kylie Jenner's Family is Worried About Her Out of Control Behavior

Things allegedly fizzled after Tyga feared the relationship might go public. "He used to find a way to see her, and that stopped. They never officially stopped seeing each other, but she’s stopped talking to him," the insider shares.

We had a feeling Kylie never fully trusted her beau. After all, she did share this funny meme in November, which suggested that she checks his text messages:

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💯 lol

A post shared by Kylie (@kyliejenner) on

Think the duo will end up calling it quits this year?