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The third and final season of "The Summer I Turned Pretty" has some serious twists and turns, but the biggest surprise — and plot point — is easily the ill-advised engagement between Belly and Jeremiah. Some context: The two both end up attending the fictional Finch College and date during their time there, only for Belly to find out, during Jeremiah's senior year, that he cheated on her during spring break in Cabo with Lacie Barone (Lily Donoghue). Belly, obviously, breaks up with him, but she also ends up reuniting with Jeremiah after experiencing trauma-induced psychosis when her brother Steven (Sean Kaufman) gets into a massive car accident and almost dies. During this scary and weird time, Jeremiah, a clown, proposes to Belly, and Belly, who's sleep-deprived and freaked out, says yes. The way that Belly and Jeremiah handle their wildly hasty engagement is bizarre and weird, especially when it comes to their parents. Although Jeremiah's dad Adam Fisher (Tom Everett Scott) eventually gives in and agrees to pay for the nuptials, Laurel steadfastly stands her ground, maintaining that Belly and Jeremiah are way too young to get married and that they should wait. (She's right!!!) During a particularly gnarly argument at Laurel's house in the suburbs of Philadelphia (not to editorialize, but go Birds), Belly completely loses control, screaming at her mother about the engagement and even storming out, leaving both of them in tears. On the one hand, it's understandable that Belly, who's barely 21 years old at this point, feels like she has to dig in her heels after making a truly absurd commitment to Jeremiah, but still, the way she treats Laurel over the whole thing is awful. Thankfully, Belly and Jeremiah come to their senses (sort of) before the wedding can actually happen, leaving Belly free to go to Paris like she originally planned (she's set to study abroad there before Jeremiah's impromptu proposal), and leaving Laurel, presumably, very relieved. Belly, despite her nickname and occasional bouts of wrongdoing, is actually a delight to watch — and if you've already binged "The Summer I Turned Pretty" on Amazon Prime Video, check out these other 12 shows.