It seems that the ecchi pseudo-incest manga "Kiss x Sis" (pseudo because the sisters aren't blood related to their young brother who they want to get with, though that one chapter where the sisters make out with each other kinda cancels out the pseudo remark) will be getting a full anime series adaptation in the coming Spring season. The series has already had two OVAs released with a third coming out later this month, but considering each OVA only covers one chapter of the manga & that they come out about every six months or so, it's taking forever for the OVAs to tell the story. But now with a proper anime adaptation, things should move along much more quickly now.

The good thing about doing the anime through OVAs was that the story didn't have to worry about censorship. You gotta wonder what the chances are for a TV adaptation of "Kiss x Sis" to go through unscathed. There's so much adult & risque content going on in the story it's not even funny. Despite that though, never once has a girl's nipple ever been clearly shown in the manga. Which is really odd considering all that goes on (the latest chapter basically had a girl character masturbating the entire chapter), & yet nipples are a no-go. Since that's the case, maybe it can survive TV censorship without too much trouble. At the very least we should hope that AT-X airs the series, since they air nearly everything uncensored. This includes Ditama Bow's (the manga-ka for KxS) other popular ecchi series, Juden-Chan.

Source: http://www.animenation.net/blog/2009/11/12/kissxsis-tv-anime