I’ve seen it more times than I care to remember. Everyone knows it exists, yet it’s seldom discussed. The insanely jealous MIL who wishes to cast out her DIL so she can have her son to herself is a societal cliche. Yet it is also a truism.
It’s not known what causes this phenomenon, as I doubt it’s been seriously studied. But what cannot be denied is the pathological lust many mother have toward their own sons. Once a boy has entered his adolescence, he often becomes the object of his mother’s sexual fantasies, particularly if she has no husband.
She will become aggressively competitive with any female who enters her son’s life as a romantic partner. “No one can take care of my baby the way I can” is the popular refrain of the Jocasta. Her desire for her son to fit any part of his body he can back into the vagina from whence he came is the not so subtle implication here.
She will stop at nothing until she has eliminated the competition and has sexually devoured her own offspring.