Quote:
— Suddenly, I kissed her.[1]
"You…!"
Thud! Kirino pushed me away.
"What, what are you doing!? What about our agreement!"
To my flushed little sister, I smiled and said
"Since we are brother and sister, what is wrong with that?"
Kirino fiercely pointed her finger at me:
"I told you, this is not an eroge! We are going to have a life counseling when we get home!"
[1] ã‚ス or 'Kisu'; while the type of kiss was not actually specified, based on an interview with the author, we can assume it was a kiss on the lips.
Afterword:
Even though I bid farewell to all of you with this last volume of the story, please, even if just a little, remember Kirino and everyone else. If, many years later, you were to inadvertently think about the characters of Oreimo, you could try imagining how they are doing in their lives right now, or something. They could be continuing with their life counselling, or they could be walking along the streets of Chiba or Akiba... Perhaps they could be happily living their lives in such a crazy manner as always. Or so we might think.
In conjuncture with my first reply to your oreimo 'rant' I just wanted to point out that the source material is more open than the anime, to cheer you up(maybe they'll release the epilogue as web-episode).
Bolded the parts which support it and were not in the Anime due to RoDs and your description.