incest

Romantic or sexual activity between canonical family members.

Use "inseki" when they're only adopted relatives or in-laws instead of blood relations

See also

• Siblings
• twincest
• sisters
• brothers
• brother and sister
• Parent and Child
• mother and daughter
• mother and son
• father and daughter
• father and son

The following tags implicate this tag: group_incest and twincest (learn more).