Part of what the story wants to avoid is having Jack get 'too OP too soon'; he needs to take his hits and grow up in his quest to make all the girls his Harem
Heya,
I understand what you want to make, but by doing that, you made the MC stupid and useless.
The blond chick, Cath, stole Gabby the second day (NTR, I'm not thanking you for that...) and the both of them are seeing the MC as a kind of servant and don't give a shit about him. The MC is the weak one because he can't do nothing without them.
Damn, I hate Cath. I would like to slap her face and tell her to shut up a little. But I can't, because the MC needs her.
You showed a little lesbian scene, but why didn't you show more when the MC returned with the water and Cath had her messed hairs ?
You have to balance you story quicly and made the MC more useful and more alpha, or you won't have the choice and you will have to add more lesbian scenes, and in this context, there will all be "NTR".
But, of course, maybe it's what you want to do, I don't know.
Good luck.