It is very hard to keep up the hard work when these apparent set backs happen. But now you know, that he wants to be home with his family, but also wants some time in different environments. Please don't take this personally. It could be down to any number of reasons, maybe BIL is more fun when in the bar?
Remember that you have done very, very well to stabilize things. Now you need to re-group while he is away on his business trip and plan how you want to approach the next few months. It always pays to go back to basics. Goals and baby steps never failed me. The man is floundering, and needs you to be strong (only he does not know that, and even if he did, may never articulate it)
Think of amd's new meditation, ok? Hugs to you. Slowly
