J, J and Hop - I relate too.
The sad fact is that your N. Mom probably knew she was in a unique position of power over you and you may have even helped rather than "exposing" her. It's sort of like watching a train wreck when all of the pieces finally do come together, ya know? It's mortifying but incredible all at once.
I don't know how many times I've been tempted to call up my N. parent's friends and scream at the top of my lungs "LET ME TELL YOU THE TRUTH!!!" However, that would make me look like the crazy one, ya know? Like they did something to me that I just can't get over--like I'm not forgiving them. I mean, how do you sum up a lifetime of abuse in one phone call anyway? However, that didn't stop me from emailing them and dropping hints, though

--I've found that people's imaginations are better than anything I could've said anyway.

he he he
The sad fact is all the deceit and cover ups are wrong, but be careful about dwelling too much on it, unless you're prepared to be called and labeled "the crazy one;" I guess in my case, I didn't care what people thought of me as I'd already been the blacksheep, the scapegoat and the crazy one for years anyway. Also, I figured if I really am crazy, I'd rather be crazy than them anyday!
From Sam Vinken's site:
V. Control by Proxy
If all else fails, the abuser recruits friends, colleagues, mates, family members, the authorities, institutions, neighbours, the media, teachers – in short, third parties – to do his bidding. He uses them to cajole, coerce, threaten, stalk, offer, retreat, tempt, convince, harass, communicate and otherwise manipulate his target. He controls these unaware instruments exactly as he plans to control his ultimate prey. He employs the same mechanisms and devices. And he dumps his props unceremoniously when the job is done.
Another form of control by proxy is to engineer situations in which abuse is inflicted upon another person. Such carefully crafted scenarios of embarrassment and humiliation provoke social sanctions (condemnation, opprobrium, or even physical punishment) against the victim. Society, or a social group become the instruments of the abuser.