I didn't have a knee replacement but when I had my hip replaced my "room mate" at the rehab was a TKR paitent.
At our rehabilitation facility we had 2 sessions daily of physical therepy and 2 session of occupation al therepy. I was there for 12 days and my roomie a little longer cause she ran into some minor problems.
I'll tell you this; I was better able to take care of myself after the rehab. Even though my family was home to help, I was definately less of a burden. And when it's time for the next hip

I'm going right back there!!