Not surprising that the prince would ignore that she already has a partner. Or rather, that was expected. The approach was strange though, since as everyone pointed out, she can just ignore it or better yet, switch it to anyone else.
@bagofsaltysalt Not exactly an important spoiler, but I’ll mark it anyways
Funny you should say that, in the novel, Ange remarked how it was crumpled looking, and it was because she crushed in her hands. So the excuse she gave was that she accidentally stepped on it.