His Terminal Illness, Her Eternal Penance.

“Ava Miller had it all: society status, designer clothes, and a marriage to Liam Carter, her quiet, long-suffering husband whom she openly despised, often favoring her charming ex, Noah. In his final months, battling a terminal illness, Liam made one desperate request: five shared "experiences" before their divorce. Ava endured them with bitter indifference, fueled by Noah's constant disdain. After Liam's quiet death, his friend, Ben, meticulously engineered revelations: Liam was "Cipher," a renowned hidden artist, whose private works hauntingly depicted Ava, each stroke a testament to his profound, unrequited love. The truth shattered Ava: the man she tortured was her silent devotee, while Noah, her trusted confidant, was a lifelong deceiver who actively orchestrated her scorn, even impersonating Liam to gain credit for his selflessness. Consumed by agonizing guilt and explosive rage, Ava lured Noah to a desolate, abandoned cellar, locking him inside to face a slow, agonizing demise. Now imprisoned, reading Liam's unedited journals, she finally confronts the immeasurable love she destroyed, embarking on a desolate penance for the love she recognized too late.”