But when rebuffed you don't then feel her up. There is a line to be crossed; she brought the passes on herself to be sure, but not the assault.
(EDIT: the replies to this make it clear my point got a bit twisted. I was rebuffing the parent to this' point about her being flirty at the party; by suggesting that flirtyness is not wrong and neither is [in many cases] making passes at flirty people. But that assaulting them after a clear rebuff is always wrong. In this case it is clear he was entirely in the wrong. Using the word "necessarily" was meant to convey that, obviously that didn't work ;))