Yo,
just read this article:
Woman sexually involved with underage teen learns sentence - FOX41.com Louisville News Kentucky Indiana News Weather Sports
Basically, it's about a divorced mother throwing sex parties with boys (ages 15-17), supplied alcohol to them and her 13-year old daughter would occasionally participate by drinking and having sex with the same boys.
Something tells me, if the sexes of the participants were reversed, the sentence would have looked much harsher.