i always thought it was foreboding bad times ahead or something, like when ivy became blind.
but then there's also the thought that through her being blind she became more 'pure', so it could have something to do with that, after the balcony scene it is showing their 'pure love', ivy's last moments of purity before she gets tainted by the outside world...unless i'm just going off on some crazy rant...
there's also the shot after the party of the random chair on it's side...it is on it's side, like wounded innocence or something...