Did Jeremiah Really Cheat on Belly? ‘TSITP’ Author Jenny Han Weighs In

Paige Strout July 17, 2025, 11:58 am

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Gavin Casalegno and Lola Tung on 'The Summer I Turned Pretty' Season 3, Episode 1; Jenny Han. — Erika Doss © AMAZON CONTENT SERVICES LLC; Michael Loccisano/Getty Images

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The Summer I Turned Pretty Season 3 started off on a shocking note, as the season’s premiere episode ends with the revelation that Jeremiah (Gavin Casalegno) cheated on Belly (Lola Tung).

During the Wednesday, July 17, episode, Belly overhears a girl say she hooked up with Jeremiah during a Spring Break trip to Mexico. Jeremiah admits to having sex with the girl, as he believed he and Belly were broken up at the time. After slapping him in the face, Belly calls off their relationship and runs away crying as Taylor Swift‘s “You’re Losing Me” plays.

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