Okay so I had two thoughts about watching the episode given reviews I read but I had to see for myself and what I saw was not bad at all. Yes Barkat turned the tables on Aaliya, but Zain did not turn on his wife. In the past Zain would have blasted Aaliya right there forcing her to apologize but today he did no such thing, infact he stopped Barkat from coming near Aaliya. He did not choose sides, he is neutral and trying to make sense of all this. From Zain's POV his reaction is completely justified in this episode.
As for the precap, these can be misleading. I am going to wait for the episode before judging because I still believe CVs would not make so much progression with both ZaYa's pairing and his character on a whole just to ruin it all in a week's time. There has to be more to this.