And this.
He told her about the plan for divorce possibly not because he has any intention of doing so (that would require effort and his priority is an easy life). He has a feeling you will divorce him, and knowing that he'll be out on his ear, he's got the reserve lined up should he need it. Staying with her is cheaper and easier than a hotel.
But equally, if you don't make that move, he'd have some reason why he couldn't divorce you at this time 'oh I can't until we move to UAE because of the divorce settlement' or 'I need to move my money so she can't find it before I do'.
Theres much here to suggest the cake and eat it approach.
When reality kicks in, I wouldn't be surprised at his attempts to win you back.
He likes the 'maid' and the 'mistress' deal. It suits him.
A divorce won't suit him.