>>559 (OP)
an /ss/ scenario is the mom grooming her son to be her lover from birth by constantly raping / molesting / having sex with him from the momment he came out of her and acting as if this was a normal thing for mothers and sons to do, by the time he grows old enough to resist her and realize the truth about the incest he is already conditioned into a literal motherfucker with no westermarck effect left intact to make him feel anything too badly about the idea of receiving the fullness of his mommys love.
variants can include the son being shared by the mom among his other female family members, and his father or uncles or grandfathers being present to get cucked by a literal kid (baby/toddler/child/tween/teen).
where it becomes a matter of cuckquean is when the incest fuckboy gets a girlfriend from outside his close family members, either hes cucking her with incest (the humiliation of him preferring them to her) or the gf cucking his female relatives (shes taking him away from them and they cant do much about it due to the illegal nature of their relationship with him, government mandated cuckqeaning, eapeciallly if she blackmails his family members into seeing her take him before them).