My thoughts and prayers also go to Arlene's mother. She will need lots of TLC (but I expect that she already gets that from the two of you). As Masaki said, a torn rotator cuff can be quite a painful injury. (My husband is currently getting physical therapy for tendonitis in his shoulder. We were relieved when the MRI showed no tear.) If she can be kept comfortable on the ship that may be just the rest she needs prior to travel back home. I hope that it all works out well for the three of you.