There is no way of physically stepping back "without feeling your world is caving in" Sarahjane and the AC who treat their parent(s) in this cruel, manipulative and controlling way know that.
Losing an AC and their children, your GC is absolutely heart breaking, the pain is beyond words and although with time the intensity lessens, it never goes away.
Some of the accounts I've seen here on GN over the years are truly heartbreaking, with P's bending over backward to accommodate every whim and desire for fear of being estranged and losing their GC too.
For some, that estrangement comes anyway despite doing all they could to try and prevent it.
Whether we like to admit it or not, we are enabling our AC to treat us this way by tolerating it. Some can tolerate it without paying the price emotionally and physically, because it's worth it to have that relationship, regardless of how bad it is. Some can't.
It isn't something that can be ignored because it's painful and distressing.
FindingNemo "No is such a little word, but such a big word to say" yes it isbut the relief when you get off that emotional roller coaster, no longer have to walk on egg shells and live in fear is even bigger.