My Sister-in-Law is Secretly a Succubus

My Sister-in-Law is Secretly a Succubus is a visual novel for players who want slow-burn corruption stories with a supernatural edge. The tone stays dialogue-heavy and tense, mixing unease with escalating temptation.

Story

Married to the affectionate but controlling Ava, the protagonist discovers her half-sister Alison is a succubus who drains men through sex. Rather than exposing her, he strikes a bargain: silence in exchange for Alison's help turning Ava into a hotwife. The pact links him to Alison telepathically, letting her steer Ava's transformation from behind the scenes, while he's left caught between guilt, arousal, and a seduction he can no longer fully control.

Gameplay

Progress unfolds through branching dialogue and narrated scenes as the player navigates the pact with Alison and its effect on his marriage. Choices shape how the protagonist responds to Ava's shifting behavior and Alison's guidance, steering the tone of the relationship without ever fully escaping the bargain's consequences.

Features

• Voiced scenes with animated 2D CG artwork
• A telepathic-bond mechanic tying the protagonist's choices to another character's off-screen influence
• Emotional-dominance and teasing-denial dynamics woven into the romance
• Supernatural corruption themes layered over a domestic setting