I hear you as I’ve been hypersensitive to it as well. Out of that arise two things which I’m pushing to remedy Some way or another - and have a Hercule Poirot epiphany in v19.
(1) Elena as D’s best friend and with the most corrupt mind of the VN should have realized what was going on with F/D way earlier. I’d like to see some self-chastising on her part on this one.
(2) As for the time between the first shower scene and the second - and the lack of resonance of familiarity the first shower scene and masturbation scene with Elena, I agree. — Arguably, Elena with her sexual escapades with almost anything that moves, Elena did not dwell on those moments or has since gotten distracted. (Unlike the Dog from “Up”, Elena cries out “ball” in the plural form.) — D on the other had, does carry a level of obliviousness with her, and with Elena, she is incredibly forgiving of Elena’s sexual comments and advances. Elena has been massaging D’s breasts since, like, forever. [back in the hotel room at F’s hometown; in the hospital room]. — However, that time has passed and the Rubicon has been crossed. IMO, everything between Elena and D from her on is invested with sexual innuendo (especially during the “holiday weekend”), at least for Elena.
Even in the D only route, imo this next release will be very much about Elena.