Key answer
Conrad Fisher discovers that his brother Jeremiah cheated on Belly Conklin in The Summer I Turned Pretty Season 2, Episode 9, titled “Finish What We Started.” The reveal occurs near the end of the episode when Conrad pieces together inconsistencies in Jeremiah’s story and sees evidence of the affair. This disclosure fuels the Season 2 finale and drives much of the Season 3 fallout.
Context: the love triangle and why the reveal matters
The relationship at the center of this question involves three core characters: Belly Conklin, Jeremiah Fisher, and Conrad Fisher. The series frames this as a long-standing emotional triangle that intensifies over the Cousins summer. Jeremiah’s affair violates the trust of both Belly and Conrad, and Conrad’s discovery shifts the power dynamics and emotional stakes for the remainder of the series.
Episode guide leading to the reveal
Across Season 2, the show layers in clues that point to Jeremiah’s secrecy and shifting loyalties. Key episodes build toward the moment of truth:
- Season 2, Episode 6 (“It’s Not a Phase”): Tension rises as Jeremiah grows emotionally distant and evasive with Belly.
- Season 2, Episode 7 (“Easy”) and Episode 8 (“Everything I Wanted”): Behavior becomes more guarded; small inconsistencies begin to stack up for Conrad.
- Season 2, Episode 9 (“Finish What We Started”): The confrontation unfolds, culminating in Conrad’s discovery of the affair.
Season 2 Episode 9: How the reveal unfolds
In “Finish What We Started,” details from a family dinner and fragments of Jeremiah’s phone usage collide. Rather than one dramatic confession, Conrad’s realization comes from accumulated evidence and Jeremiah’s inability to explain away discrepancies. The episode ends on a heavy note, with Conrad processing the betrayal and the broader implications for his family and for Belly.
Immediate consequences
The fallout of Conrad’s discovery sets up the Season 2 finale and carries directly into Season 3. Emotional distance between the brothers becomes overt, family dynamics grow more strained, and Belly is forced to confront the reality of Jeremiah’s actions. Trust within the core trio is fundamentally altered, reshaping how each character approaches love, loyalty, and honesty moving forward.
Themes and character impact
- Trust and secrecy: The affair exposes how fragile trust can be within close-knit relationships.
- Family loyalty vs. personal desire: Jeremiah’s choices pit familial bonds against romantic impulses, with Conrad forced to choose sides.
- Coming-of-age accountability: The series uses the reveal to mature its characters, emphasizing consequences over neat resolutions.
Episode and series details
| Attribute | Verified Detail | Source Type |
|---|---|---|
| Series | The Summer I Turned Pretty | Official series (Amazon Prime Video) |
| Season | 2 | Official episode order |
| Episode | 9 | Official episode numbering |
| Episode title | “Finish What We Started” | Prime Video episode metadata |
| Approximate runtime | 38–44 minutes | Prime Video listing |
| Key narrative event | Conrad discovers Jeremiah’s affair with Belly | Series plot summary and reviews |
How this fits into the broader series arc
The Jeremiah–Belly–Conrad triangle is a throughline across both books and the series. The Season 2 affair and Conrad’s discovery reconfigure the group’s dynamics, raising questions about honesty, boundaries, and whether the relationships can recover. The narrative does not resolve cleanly, instead using the affair to deepen character work and set up ongoing tension in later seasons.
Viewer guidance
If you are catching up or rewatching, keep an eye on small moments before Episode 9: Jeremiah’s secretiveness, hesitations around Belly, and abrupt schedule changes all foreshadow the reveal. The scene work in “Finish What We Started” emphasizes implication and reaction over melodrama, which is consistent with the series’ tone throughout.