Kansas City Chiefs quarterback Patrick Mahomes’s girlfriend alleged on Sunday that she and Mahomes’ brother were mistreated by New England Patriots fans.

In a series of tweets, Brittany Matthews recounted how she and Mahomes’ younger brother Jackson were harassed by Patriots supporters during the team’s 23-16 loss to the Chiefs at Gillette Stadium on Sunday. Matthews said that as soon as she and Jackson Mahomes sat down, drunk fans began harassing them.

“This place is horrible, people already yelling every time I stand up, am I not aloud to stand up for football game?” tweeted Matthews, a personal trainer before Jackson Mahomes echoed her sentiment.

Matthews then went on to reveal security at the stadium escorted her and Jackson Mahomes to a “safe place.”

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Matthews also took to Instagram to reveal that security staff assured her there were cameras all around the stands to prove she and Jackson Mahomes were being mistreated.

“I’m here & these fans will NEVER keep me away,” she wrote.

With Sunday’s victory, the Chiefs handed the Patriots their third loss of the season. Patrick Mahomes also became the first signal-caller under 25 to defeat the Pats in Foxborough since Tom Brady joined the franchise. According to The New York Post, Matthews got her revenge on Patriots fans on Sunday by mockingly chanting, “Na na na na, na na na na, hey hey, goodbye.”