WAS wanting to move across the world - help

[whywhy]

I am updating and hoping some of the wise on this board can give me some advice and the benefit of their experience.

So, some progress has been made. She finally looked at the numbers and heard the kids and, after a long negotiation, has decided to stay here for the academic year with the kids!!
But, it involved us drawing up a written agreement that guaranteed that we would leave the country at the end of the year, live in the same house but separate rooms and some other financial terms.
She also agreed to keep going to couples therapy until the end of the year, even though she has stated clearly that she wants a D and continues to say it.

After we signed the agreement, we discussed quietly over a coffee a few other things, especially a planned visit by her parents (remember her mother is here with us now which is really uncomfortable for me) in September. We agreed to ask her parents to delay it to the end of the year as we are in such a delicate position.

So, this morning, her mother tells me that she isn't intending to move her ticket dates and is still coming in September.

I waited a few hours to gather my thoughts and stay calm and just spoke to my wife about it. I mentioned that we had agreed yesterday mutually in our discussion about this. She got really angry with me and told me that it's because she's scared to express her true feelings around me.
She said that if I didn't like it I could go out to a hotel while they're here (over a month).

What do I do here? I think it will be really difficult having them here then and it will be tough for me.

Also, my wife is going away on Monday for 3 weeks with the baby leaving me with the other 3 kids, which I'm really happy about as the house is just so intense.

Could really use some perspective and advice here.

Thanks