I read this in another site before but forgot the name 😭 basically mc is a boy who's ob...

I read this in another site before but forgot the name basically mc is a boy who's obsessed with his classmate's mom. Turns out he's kind of not right in the head yk. He doesn't live with his bio parents but has a foster mom or smthng tht was once a nurse who took care of him but was later manipulated or something like tht by mc. Turns out mc always targets moms and he's had lots of moms before his present one. Now tht he's found someone better(his classmate's mom) he's decided to abandon his current mom and manipulate his classmate's mom to bring his mom because his cassmate doesn't appreciate his own mom nd uses it to his advantage. There was a very disturbing image where mc imagines himself A TODDLER. GROWN, inside his classmate's mom's belly as if he's still inside his so called mother's womb or something.
Last chapter I read was the mc being stabbed. There's more to the story tht I remember but this will do, I'll add more info if y'all need it I just wanna reread this cause I find it fascinating (=・ω・=)