I dont think you can jump back from the Others path to a main girl path for the rest of 5 episode.
You can jump off from it, but only for Zoey, which mean you fucked up, and that is a condolence prize as a thank you for playing with the game 
Unless DPC decides to make another girl currently in Others a MG. He did say during the Q&A 2024 that he still had to make a scene for this:
"
Without spoilers, is there any scene between episode 10 and the end of the game that you're more excited to make and/or see fan reactions for than any other scenes? What episode is it planned to appear in?
Without spoilers, the only way I can answer this one is "An emphatic yes. Holy fuck, yes. I've waited many years for this. Yes. Yes. Yes!"."
This could be anything including making a popular sidegirl a main girl (like Riona or Quinn) and thus getting off the Others route later on in the game.
It might also be:
- The scene where Riona finally fights back against Quinn we got in 11
- That we finally get to see what's in the room (happening in 12)
- finally sex with popular x-girl (Tara, Sally, Elena, Heather, etc.)
- finally anal sex with Madame (jk, I'm probably one of the few who were looking for it)
Just to name a few.