I am not a Slow Burn fan by any stretch of the imagination, but she has just reached the tipping point of starting to be corrupted. Thank God.
However I am also not a fan of the InstaSlut, She would need to be a lot more corrupted imo to have her running around in school with a see through top, maybe a shorter skirt but the Dean has no reason to push her much harder at this point as he is already falling for his game. Provide a plausible scenario where it makes sense and I am all for it, but going BOOM - InstaWhore would be very unsatisfying.