incest
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.
See also
* Siblings
** twincest
** sisters
** brothers
** brother and sister
* Parent and Child
** mother and daughter
** mother and son
** father and daughter
** father and son
* Cousins
* Self
** selfcest
Aliases: none