there is an easy way to answer that - truthfully, but skirting (ahem) the issue:
'it looks nice/suits you/wheres me tea ?'.
the last one might earn a slap.
it also helps to point out people whos 'arris really is big.
with monotonous regularity.
suggesting that she wears a thong can help ;-) I use 'uhhh-VPL !!'