Seeing how you're so stuck on grammar, maybe you should look back on your own comment and see how it is interpreted from a 3rd perspective.
You're using a lot of unneccesary aggressive, demanding language like "You need to do this, THIS NEEDS FIXING"
You come across as if you're entitled to make the dev your monkey and have him write you a story exclusively for you.
That barely came of as constructive criticism and more like an insecure, entitled karen brat that demands to speak to the manager.
Let me quote the exact language if you don't understand what I mean:
"You need to go back to her being exclusive only, or otherwise, give us the choice to allow her to be a whore.."
"You need to stop writing Sandra like this, your ruining the story completely by doing it! Feel free to keep turning alice into the cum dumpster whore she is.."
"He seriously needs a personality change urgently."
"Just get rid of the bullshit abuse and constantly swearting,, the utterly retarded things he says. It completel ruins the story!"
"give us the choice so she is exclusive and if we choose that that, then make sure she is exclusive in everything to the MC not some plaything for other women or her doing it, that really made me quite mad as i was reading." (this one is quite special, there's actually a lot to unpack about your character here, Killer7 already mentioned it, but it seems really extremely insecure)
"you need to change it, because it is wrong."
See, there's quite a lot of DEMANDS and a lack of constructive criticism.
And I'm not even mentioning all the edgy remarks you make while using a slur that is used to describe disabled people.
To come to a conclusion, it seemed more like a rant, because your insecurity about Sandra not being entirely exclusive made you mad and you wanted to let your frustration out, but didn't expect an answer, seeing how you even backpedaled on the exclusivity of Sandra.
Example: " i mean its fine if she isnt going to fool around outside the family."
When it was: "It doesn't mean she will mess around with Alice or kiss other women, which seems to be alluded to as the story goes on during the first 9 chapters. If she was exclusive, then she most certainly wouldn't allow other people to touch her let alone kiss her. You need to go back to her being exclusive only, or otherwise, give us the choice to allow her to be a whore...which your basically starting to write her as a whore with her sisters and mother. I mean seriously sucking on her mom's tit for fucks sake while her mom is asleep? That is not the complete opposite from being exclusive and there really is zero reason why she is doing it in the first place, considering she told the mc she was EXCLUSIVELY his! so why try to make her into some whore? It doesn't fit with who she is, it doesn't fit with the way she acts or thinks and we know that from the first few chapters. You need to stop writing Sandra like this, your ruining the story completely by doing it!" this before.
That is quite a remarkably fast switch from claiming he's "completely ruining the story" to "well I guess it's okay if it stays in the family".