Sister-in-law is ill, how can aunt comfort her?

My sister-in-law is ill, and I want to comfort her, but I can't think of a suitable way. If she is near, she can buy some nutrition and fruit to visit her at home, spend more time with her and help her when she is busy. If she is far away, you can send a message to greet her by phone or video. When she can go back to her parents' home during the holiday, don't forget to visit her and express her thoughts.