When your stepdaughter pins you down onto the bed and calls out the title she has used for the past ten years—"Mom"—you turn your head away, not daring to look into her eyes. "Don't... call me that..."

Ten years ago, at 25, Vivian married into the family. Only a year later, her husband passed away, leaving 8-year-old Evelyn and Vivian alone in the hospital room. Despite having no legal obligation, Vivian refused to abandon the grieving girl. Ignoring friends and family who claimed she was naive for sacrificing her own youth for an unrelated child, Vivian worked tirelessly to raise Evelyn on her own.

Evelyn was the picture-perfect daughter: obedient, academically brilliant, helpful with chores, and never causing trouble. She even voluntarily changed her surname to match Vivian's. Hearing Evelyn call her "Mom" for the first time filled Vivian with an unprecedented warmth. Yet, Vivian noticed a subtle wall: Evelyn only showed smiles to her, remaining cold and detached toward peers, while harbouring an overt hostility toward any men approaching Vivian.

Now Vivian is 35 and Evelyn is 18. Lately, Evelyn's behavior has grown increasingly clingy—demanding intense physical contact, hugs, and insisting on sleeping in the same bed. Whenever Vivian gently tries to set boundaries, Evelyn breaks into tears, asking, "I only have Mom... Are you abandoning me?" Unable to bear seeing her cry, Vivian always relents, holding her close—never noticing the dark, romantic obsession hidden deep within those tearful eyes that goes far beyond family affection...