The short answer
How does Regretting You end?
Clara admits she believes her text to Jenny caused the fatal crash. Morgan tells her that Chris was driving and that Chris and Jenny were having an affair. The disclosure clears Clara's guilt and explains Morgan's behavior, allowing mother and daughter to reconcile. Morgan chooses a future with Jonah; Clara reunites with Miller. Morgan destroys Jenny's letters without reading them, so the affair's complete history remains unknown.
The final chain of events
- 01
Secrecy reaches its limit
Morgan's refusal to explain the affair makes Clara increasingly hostile and leaves Jonah unwilling to build a relationship on another hidden truth.
- 02
Clara confesses her guilt
While intoxicated and grieving, Clara reveals that she had texted Jenny near the time of the crash and fears she caused the accident.
- 03
Morgan tells her the truth
Morgan explains that Chris was driving and that he and Jenny were secretly involved. Clara finally understands both the crash and her mother's anger.
- 04
The two romances move forward
Morgan and Jonah admit the feelings they suppressed as teenagers. Clara and Miller reconcile, and their completed short film includes his invitation to prom.
- 05
The letters are destroyed
Morgan chooses not to let Chris and Jenny's private explanations dominate the survivors' future. That decision brings emotional closure but withholds factual closure.
Is Chris Elijah's biological father?
The affair makes that possibility serious, and the characters come to believe Jonah may not be Elijah's biological father. The novel does not stage a definitive DNA-test reveal for the reader. The emotional conclusion is that Jonah continues to treat Elijah as his son regardless of the unanswered biology.
Confirmed in the story
Chris and Jenny had an affair
Their meeting, the car journey and the hidden correspondence establish the betrayal.
Strongly suspected
The affair affects Elijah's paternity
The possibility changes how Morgan and Jonah interpret the past, but suspicion is not the same as a neutral test result.
Intentionally withheld
The full content of Jenny's letters
Because Morgan destroys them, neither the characters nor readers receive a complete account of the affair.
What does the title mean?
The title initially sounds like an accusation aimed at the unfaithful partners or at a teenage choice. By the end, Morgan rejects the idea that Clara—or the life that led her back to Jonah—is something she regrets. Regret remains part of the story, but it no longer gets the final word.
How does the 2025 movie ending differ?
The film keeps the affair reveal, the mother-daughter reconciliation and both romances. It makes the Elijah question more visually explicit through Jonah's observations, while still not presenting an on-screen DNA result. Its closing celebration gives Clara and Miller's prom invitation a larger final beat, and Morgan and Jonah receive a rain-soaked romantic payoff.
Book emphasis
Interior reconciliation
Alternating narration makes Morgan and Clara's changed understanding the climax.
Film emphasis
Shared celebratory closure
The birthday gathering and prom video place the repaired family in one visible final sequence.
Questions readers ask
Do Morgan and Jonah end up together?
Yes. They acknowledge that their connection existed before Morgan's pregnancy and choose a relationship in the present.
Do Clara and Miller stay together?
They reconcile, complete their film and plan for a shared creative future.
Why doesn't Morgan read the letters?
She decides that knowing every explanation would not undo the betrayal and might keep Chris and Jenny's choices at the center of the survivors' lives.
Editorial note
Sources and method
- SuperSummary — final chapters
- SuperSummary — complete plot overview
- Parade — book and movie differences
- Cosmopolitan — film ending account
Last source review: August 9, 2026. Paternity language is deliberately limited to what the story establishes.