Which lesbian ? The frilly loli ? And I doubt she actually is, since there will be pomfing at the end of the day.
And honestly I dont think they would put a lesbo into a waifu simulator. I know some people like their yuri shit (I clearly dont duh), but Japs are also pretty ardent in "if they like something they like it and others be damned" = meaning I dont think the devs would dare to put a lesbo char. into a waifu simulator as that would go against the setting the players enjoy, and wouldnt generate much good will.
Edit: Aint the content between the two versions shared ? Meaning you can log into the Non adult version, play the maps, earn the gems, "read" the story, and then come back to the Adult version, while maintaining your account and all the progress ?