Last minute to cancil

MIL fked Xmas. She suggested a day trip. It was all her idea. We were all excited. We have had a really tough year with so many uncertainty coming early next yr. My husband really needed this. We said we'd cover all good costs which costs a fortune for how many of us there are.
Thismorning, Xmas morning, she tested to cancil because there was a small chance of rain. We knew this was going to happen as days befor she kepted making excuses as to why she may not be able to go. I had words with her vis text, after hubby felt broken (he holds his emotions in but it was very clear) and went back to bed. She said we could go over and have lunch there. When I didn't reply to that, a text followed saying she will be sitting on the balcony all on her "lonesome" her usual guilt trip. She always complaines We spend no time with her. We visit every other weekend. We always invite her on day trips because she loves to go where we go, but will cancil at last minute, then the next day will go herself and then continue to complain We do nothing with her. Most of the time, she's the one to organise. Then the guilt trip comes when we get annoyed or upset. I want to put her in her place but a just can't be fked to deal with the aftermath