I would say the scene provides far more insight to her character than the previous ones. Yes her attraction toward the MC was obvious from the start but the scene was played in way that consolidates the MC is her only real source of comfort and her only meaningful relationship. So far, she has been her own worst enemy. By never dropping her bitchy and arrogant persona, she has subconsciously pushed everyone away. She saw Tommy as a friend but she still pushed on his buttons, lied to him and ruined his trust. She's Sage's confidant but she still plots behind her back all the time and acts like a poor friend. She mays value Riona as her right hand and probably best friend but she still acts abusive and manipulative. Her overall family and growing environment seem pretty fucked up but she ruined her actual relationships by herself. She's the one to blame.
During the threesome or the lewd scene on the roof, she indeed dropped some hints of her feelings but she stood in control. She still kept her pragmatic and playful persona and even tried to make money out of it. It played out differently in the library. She's completely defeated and confused. She didn't even try to be sarcastic, playful or seductive. She even rejected MC's offer to give her some money (
Yes she rejected money 
)and didn't get why in the world he would try to help her without anything in return. That's the first time the MC expresses a genuine interest in her beyond simple lust and physical attraction. At this point, none of them planned or expressed the desire to fuck, they just did because they were overwhelmed by their conflicted feelings and confusion. Unlike the previous scenes, she's the one whom kissed him passionately without second thought.
It's the only lewd scene so far without any dialogue. No cringe lines, no
I'm gonna come, her pussy/ass feels so good,
fuck me harder, I want your load in my pussy ! No inner dialogues. Because there's nothing left to say. Acts spooke louder than words. Like others mentioned previously, even the music and lyrics give the tone. If just one scene embodiments their relationship, that's this one.
To me, the HOTs evaluation was a letdown. Yes DPC had to find a no-NTR way to make M&J pass the evaluation but the Arieth card is pretty weak. Funny but weak. We didn't even have a global picture of Camila/Mona & Lily/Ashley owns tasks. For the Diks evaluation, all of them testified and witnessed the proofs. It felt like a real hazing and welcoming ceremony. In HOTs case, a single mother testifies for the daughter and no else has anything to say. It feels like having a positive relationship with the mother is the main trick. Despite being Maya's mother, Quinn didn't even check all the evidence by herself. There's not even a prize. Lily clearly did all the hard tasks for Ashley but no one except Sarah objected or asked for evidences. Compared to Diks, it's pretty unfair
. No real tension, no plot twist. It was too easy.
