One thing thats really bothering me this ep and last ep is how it looks like ako and keita gonna "do it", but always end up getting cut short. I know this is not hentai, but damn it!!! Getting all worked up for nothing sucks. Though up to now, I find kissxsis more comedic than erotic, mainly cause how idiotic and goofy Keita is in response to his sisters. U got 2 pretty girls, just do them...and also i cannot imagine ako and riko going all crazy for Keita like this everyday. Not realistic, cause should only last up to some point, but i'm not too bothered by this.
Real incest plus lesbian love = killer move. I love it. But It was a bit sad because they had first sex and came with each other not with Keita :P Anyway awesome episode, and real yuri incest, totally worth it! Also Shana's triple urusai done by Ayana Taketatsu who also voices Kirino, so that's rather Kirino than Shana XDDD
I imagine if they forgot about that marker and Keita uses it and finds out it has Riko-nee sweet scent XDDD