I am glad to come here and read that your FIL is going to keep vigil w/your H. Men express their fears/concerns/worries a lot differently then we do. Hopefully when 5:30 rolls around, she will be in recovery resting.
Hang in there. We are all praying for her.
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.