I don't really think we're gonna get specific epilogue/endings for every situation of a girl "ending or not" with Kirito (As much as what Sugu or Sinon have with him can be counted, LMAO), it's most likely that, if we DO end up getting alternative endings regarding the non-main story girls winning/losing at something, they're completely tied up together, like, Alice, Sinon, and Suguha's ending 'events' will most likely be all tied up together rather than specifically separated because all of them really depend on the council being 'defeated' or not (As Alice is brainwashed by one of the members), I don't see Fujino specifically going through the trouble of making triggers/paths to different endings like "Sinon/Suguha didn't end up with Kirito so they did this, but Alice still was a brainwashed slut" or "Alice got free from the brainwash but Suguha and Sinon got enslaved by the council still", etc. Besides it being a ton of extra work that more than 90% of his followers won't care about (As they're only here to see Inoda railing Asuna), it would make the game even more complicated and give him even more work.
Also, because realistically, and one of the biggest issues I have had when trying to think of an ending where Fujino's Sugu "wins", is that she would NOT take a no for an answer at this point, LOL. She's a borderline psycho yandere rapist, if Kirito really did NOT accept her feelings she would most likely snap and go "Fuck it", confess everything about Inoda and Asuna, show him the evidence of her recordings, then proceed to fuck the heart/mind-broken to her heart's contents for the rest of her life as at that point she would have nothing to lose XD There is no ending where she would "voluntarily return to the brothel" now, only way I can see her back there is either for some work for Sinon or, ending-wise, if the council breaks her and Sinon and turns her into the same kinda sluts Alice is now :O