近親相姦 母子相姦 姉妹百合 姉弟相姦 兄妹相姦 乱伦 父娘相姦
Romantic or sexual activity between blood-related family members.
Use "inseki" when they're only adopted relatives, step-siblings or step-parent and step-child pairings instead of blood relations.
The following tags implicate this tag: group_incest and twincest (learn more).
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