It makes a small difference, I'd think. Because being nearly naked and actually naked are two different things. If what you saw wasn't her Vanity Fair photos or actually her naked chests, then something like that can probably be removed fairly quickly, as it promotes child pornography.
Otherwise, without paying more, I'd imagine the only way to really regulate ads is to simply to not post stuff that would set off the adsense to give you ads like that.
You can complain, sure, but if the adsense thinks it's valid, I wouldn't think there's much you can do.