I don't think she does realise, actually - it's kind of a suspicion at this point, supported by Shenxiu's reactions but definitely not confirmed (Xiuxiu tends to be a bit weird, after all - maybe peaches just freak her out randomly sometimes, or something equally strange....)Gotta love how they completely reset the mood after such a hot last chapter. It also makes no sense that Xu Ke would leave at that after she realizes they had the same wet dream. Oh well, i would be too easy i guess.
Thanks for the really fast upload!