I really do hope Lacey is an unrepentent slut deep inside, that she really wants to be one again as a form of escapism. I think dev should focus on Lacey's struggle with ketamine addiction more and that it'll be up to the player how deep this NTR rabbithole will go. Lacey's dissociative disorder should play a large role, and in the end the player could choose to nurture the sweet, remorseful slut Lacey OR the uninhibited, drugged out party slut - either way, Lacey loves the MC but only one of these involve sharing her with other men.
For sure the smiling pics that the pimp shows MC do point towards a similar direction to what you are implying, without the drugs.
But I think that is a bit on the nose and Lacey denied it in front of the pimp, is she hiding herself from the pimp too?
I don't think that is the case.
I said often how much I'd like to see Lacey's junior year explored, there is a lot of stuff there aside from sex and even if I am now being considered a Lacey simp

I think she is NOT being fully honest there.
She had fun too, quite a bit as well.
Sure, the gangbangs where harsh, she was treated poorly, the sex wasn't great most of the time, at some point it would hurt and she was doing it also to punish herself + pleasing her pimp.
But she went to raves, she shared toothbrushes with her exes, she went to carnival fairs and she also had outdoor "parties".
Whille laughing with her pimp about silly cock nicknames, planning the next slut dress and events.
Remember that she said people could participate on what she wanted to do on that specific night, no requests? Well folks dragged motorcicles in for her to be fucked on, did she plan that as well?
So, did she really spend most of the time between parties wallowing about MC and her abuse? Was she THAT miserable?
I am not saying she wasn't, she was a fucking lot but probably not as much as we are told, or at least way less than she convinced herself of.
And lets not forget first and second periods, which are barely touched, all the time before the pimp kicked into gear and started the full on abuse.
I still think the writing is leading more towards Lacey smiling because she was sober and was able to go through with it + the pimp was VERY pleased.
I cannot shake those thoughts from my mind, if you think about it, if Lacey was able to go through with the pimp requests anyway, why it was so necessary for the pimp to have the last hurrah laced with drugs? Could it be that getting drunk and on drugs was actually fun for them?
I want to see it! I WANT TO SEE IT ALL!
PSA: I have seen some posts with people liking and praising Mia.
Please get help, get help to recognize signs of abuse around you, so you can help yourself or a friend in the future.
And I am only half joking.