The twist works very well. After it soon became steamy, I was grateful for the marital turn…lol. No, it’s a nice combination of ‘living a fantasy’ and ‘back to earth’.
Thinking about potential changes…I would say that -given more space- one could try more subtlety or delay in the first part, but then again it’s believable as it is. They probably have to take advantage of short windows, so the internal clock is ticking. Therefore the hurried style, but yet a creative way to keep it exciting.