Wet, Your w could have just been talking things out loud because whatever was going on w/her at the time was stressing her out. I'm sorry that your son hurt knee. I hope the damage isn't too great and that he'll be up and about in no time.
As for you my dear friend...keep your expectations at zero. Actions always speak louder than words and until she actually does something in her home to make room for you, as well as possibly helping you to pack and move, then I would take whatever she's saying w/a grain of salt.
Hang in there! She's still got a long way to go.
Sit quietly, the answers will reveal themselves when you least expect them to. The past is gone, the present is a gift and you need to focus on today, allow the future to reveal itself when it is ready.