The son (character) always doesn't know who was his father. Then he find that grandfather was his father. His grandfather sex with mother when her was 16(18).
The grandfather training the grandmother and mother as sex toy (nipple piercing). The grandmother said that her loss of fertility after giving birth to a daughter (the character's mother) so she accept the grandfather could be seduce with daughter(character's mother) if she accept.
The son was join that the incest after he find the secret.
Then the mother and grandmother all pregnant again.
The grandfather training the grandmother and mother as sex toy (nipple piercing). The grandmother said that her loss of fertility after giving birth to a daughter (the character's mother) so she accept the grandfather could be seduce with daughter(character's mother) if she accept.
The son was join that the incest after he find the secret.
Then the mother and grandmother all pregnant again.
