Yippee! I am so happy for your sister and entire family.
I just want to offer some advice that was so helpful to me. After surgery, I had to cough alot. The nurse told me to hold a pillow to my stomach when I coughed. It really took away the pain. So make sure your sister has an extra pillow to hold to her stomach when she moves or coughs. It really is amazing how much it helped.
Sending loads of wishes for a quick recovery!
Kris