Does Rin's Eclipse scene "Beginners" in Fate/hollow ataraxia follow the UBW route? Is Rin's Eclipse (H-)scene (Beginners) in Fate/hollow ataraxia canon?

I'd like to know if it follows Rin's true ending. Just to make it clear, I'm not asking if FHA follows UBW, I'm asking if that H-scene follows UBW True End (or maybe Good End).
Spoilers regarding the H-scenes ahead

I take it it appears too good to be true for you. 
Now, is it canon? Nasu did confirm it as such. 

If I had to state my opinion I'd say as a whole Rin's scene does seem very reasonable just like the other eclipse scenes. If something, I'd add that the competition part (they fight to win over who pleasures the other more; Shirou becoming even a bit cruel and unlike himself whe he tells her at the beginning to touch herself while he watches), Rin using her magic to make her weight disappear even when orgasming and the use of apphrodisiacs may be more like fanservice, but then again it is an eroge and since the very beginning Nasu made Shirou unable to give mana but through sex because he has no magical knowledge. You can't get more porn vibes than that.
Think that Rin becoming more feminine, enjoying herself with Shirou and starting to accept her feelings a bit more is what makes sense after the UBW route.

I was the first one to reply this question and now there are 5 other answers (there are 6 counting mine as of now, from кяαzєя, Memor, Lord, Echomateria, Dumpster Player and myself). I don't agree with some statements from  кяαzєя as I showed in my comments to his answer. After reading all the answers I have more reasons to believe it does happen after UBW. Some of the arguments given in other answers are that the eclipse scenes are canon as I had said in my original post, that they don't belong to Fate Hollow's actual game but are instead set up to be a direct continuation of some of the original game endings...
And it's true. They don't belong to the storyline followed by Fate Hollow and it's also true they've been composed to follow Fate Stay Night endings. It does make sense for them to be a continuation as their canonicity has been established by the game authors. Pretty much everyone defend this point of view (Echomateria, Memor, Lord and myself outright defend this point of view).

About Hollow's true ending, which happens outside the time loop, Memor and Dumpster didn't touch this topic as it wasn't asked by the OP. I would completely agree with Echomateria and Lord's answer in that regard though a. As echomateria said in his answer it would be an alternate reality, just like each route is an alternate reality from each other. So basically it would be another route made by Nasu. According to the creators an scenario also exists where it is actually the sequel to Stay Night. This was actually treated in more detail by Lord in his answer.
When Takeuchi was asked whether Hollow is the continution of all 3 routes his conclusion was that the reader should interpret it however he wants, so either way.