She doesn't accept it. She just doesn't give the idiot prince the pleasure of any girly reaction. Instead she puts the pen away properly and then burns him, as if she was dealing with some vermin. If she did have a stronger reaction specifically to the moron fondling her breasts, it would only encourage him, but this way she shows she doesn't consider him a man at all, so it doesn't really matter, but she's still going to teach him a lesson for disrespecting and annoying her. It's quite solid psychology. As expected of Roxy.