Just as the title side. I'm just gonna add some starts and short ideas and we can mix and match

Possessive

"You'd be nothing without me"

Controlling everything including clothes they wear

Not letting them learn basic human skills so they can't do anything without them

Not allowed to go out

Making themself the victim

Almost drowning

Quick switch between kind and sweet and bitter and cold

Trapping in basement/closet

Threatening life with gun/knife