UPDATE (2/28): Nope, she's back in the ICU...
My dear MIL is out of the ICU and has started walking again!
This is wonderful news and it puts her back on a trajectory to come home soon.
Even better, when she is home, she will have a nurse to care for her and even prepare her meals while she recovers, which means she should be able to come home directly from the hospital instead of going to a nursing home for the next phase of recovery.
Thank you from the bottom of my heart for your prayers!!