This webpage contains a lots of information about how to recognise coercive control when it's happening to older people, and what to do about it.
Coercive control is a manipulative form of abuse that can start off innocently by the abuser before becoming ingrained in controlling behaviour.
Often it’s the people closest to them perpetrating the abuse. When an older person realises they are victims of coercive control, they may genuinely wonder how it happened.