Lesbian stuff in NTR is like... the most boring thing you can imagine probably, especially if it's "pushing" corruption. Like wow, girl now push another girl to kiss another girl, INSANE!, what a corruption

.
For it to be NTR (as in netorare) - you (as player) should... kinda care what girl cheats on you, and what she will do something you consider cheating. And I might be wrong or too open minded, but I think there is considerable amount of ppl who if asked "do you consider cheating, if your girl will kiss or jerk another woman off?" they will be like "Eh, I guess it's whatever. Maybe she will call me next time to join, lol

"
If she will push her to cheat with SOMEONE and make her more open to it - it fits. If it's FFM LATER down the line, yeah - it fits. It can work if Flora (or Adri) "push" her toward other man to "corrupt" her toward cheating WITH HIM (Justin in this case), but not to claim her for themself in "Oi, I will steal GF of my brother, lol" kinda way.
If her beginning and first "sex" will be with another girl? Meh, again - it's whatever and just straight up boring to see
Is there many ppl who would care about Adrianna cheating on *her girlfriend name*, if it was with another girl? Let's be real
I see there is some (1-2) dudes who want to turn this in to some lesbo heaven with every girl jumping on the GF of main protag, but there is a reason why it's not that popular in NTR titles - not that many ppl care about it and it's boring


In my opinion of course