I'd like to mention another perspective.
Let's consider the fact that komodo dragons are isolated due to their poison. This is something his mother is aware of, having been raised by her dad.
So which teenage girl voluntarily tells people about her hybrid nature which includes a POISONOUS dad, which, doesn't matter how kind and sweet he is, will get her isolated at best and bullied at worst? Doesn't matter if she's poisonous or not. Simply having a dad that can kill people if he shares food - well, that's enough to kiss school life goodbye.
Frankly, in her position, even if it seems crass, I would have considered hiding that fact as well, especially in a boarding school.
Her killing herself once she got daddys scales is another topic altogether, and frankly, I'd like to pass my judgment on that after the next chapter.
But honestly, personally I really like that she's so vain, it's honestly refreshing to see a dead, well loved and horrible vain mom. Love that. Mommys aren't perfect and even loving ones have their faults!