It's the Cover-Up, Stupid!
The most damaging thing to Edwards' reputation is not the alleged affair (or the child it produced) but the elaborate cover-up he engaged in last year to prevent it from ruining his presidential chances. Allowing a married aide with two young kids to take the rap for him, to pretend he was the father of his mistress' child. Wow! Talk about misplaced loyalty.
Anyway, it's always the cover-up that gets 'em.
Which brings us to Cece Grimes.
She's pleading guilty to a charge of destroying evidence during a federal investigation into her business dealings with Curt Weldon. Just what the evidence was that she destroyed is still unclear. But it is entirely possible that the evidence wasn't related to any "crime" but of a personal relationship that if made public would have been embarrassing to herself and others.
The cover-up in this case is a felony. There is embarrassment and there is committing a crime. To avoid one, Grimes did the other and ended up with both.
Anyway, that's how it's looking right now.