donghua relationship between Xiao yan and Cai Lin

I saw that btth is coming slowly towards end so I have questions?

I heard that in donghua they drastically change relationship between xiao yan and cai lin (medusa) so I want to ask what is their relationship currently in donghua? (right now season 5 have about 180 episodes)

And what about Xiao xiao?

I also heard that they skipped their wedding does that mean that they plan to keep only Xue er as single wife because that would be dissapointing. So how does it look like now between them, do they even have some feelings between each other?