It was Aravis' last chance to wear a really lovely dress from these times and this world. (At least until homecoming.) She had a strong suspicion that the
gown she'd selected, lovely though it was, would not do well in Archenland -- though she had to smile at the idea of Cor seeing her in it, someday.
However, the dress made her think, as she tried it on, that it could be filled in more on top (as could most of her clothing, in her opinion.) And so within minutes, Aravis had creatively used bits of wadded up tissue to, well, enhance her bustline. And she decided that she liked the look of it so much that she left it that way even as she changed back into her everyday dress.
So it was an exceptionally well-endowed Aravis who was humming with the door half-open as she attempted to pile her hair on top of her head in preparation for the next day. Perhaps for once she'd do something with it.
[...I'm bored and always figured she'd do this at some point anyway. open!]