I was trying to figure out how they are supposed to play the game against Wufeng:
YWS knows now about ZiYi, Wuji, SGQ
So they can assume pleasure house is Wufeng outpost, Wuji can be easily kept under control by giving her guardians and saying GZY is afraid she might be attacked again
SGQ is very manipulative and simply shrewd so dealing with her is not that simple. Main thing iis to hide a fact that YWS changed sides and followed up her heart to keep her safe. So they will have to either trust the Xue guys to get more help to deal with Wufeng as well as to counteracts SGQ plans of using GSJ to eliminate YWS when she will play dirty and give him the map.
JF and GZS will be for sure included too as we had seen guards using gun powders weapons - which will be invented by GZS and made in secret by YM Hua ???
They should use wedding as a trap for Wufeng and keep all prep well hidden.
Return of big bro will be for sure big surprise and I hope GZY won't trust him fully - he should learn already to be careful and first check facts and then take decisions.
As someone mention we had seen YWS and GZY double cultivation scene so it will be them probably activating infinite heat or healing each other. This let me believe they will remain true to each other till the end of the story.
I hope they can give huge surprise to Wufeng and make them to crawl back into that dark pit and prevent its rebuilding. But we can already say both sides will have heavy losses