A viral TikTok from creator Katelyn (@kateysuperspam) has left millions of viewers in disbelief after she claimed she caught her ex-boyfriend being intimate with his own sister.

In her now-viral clip, which has racked up 11.4 million views and 1.6 million likes, the TikToker recounted the night she followed her instincts to a nearby park and allegedly discovered her boyfriend “doing something crazy you should never do with your sister.” The internet has responded with shock and disbelief.

It started as a picture-perfect relationship that eventually turned strange

“Story time on how my ex-boyfriend cheated on me with his sister,” Katelyn began in the clip. She explained that they had been together for about a year and appeared to everyone else as the kind of couple that would last foreve

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