A tilted bed sometimes helps with restless sleep while recovering with incisions. If you have to leave during the day, check with her before you leave. She may need her fruit juice re-iced. This can be applied to the tummy or back as needed. Give back rubs.
Emotional support is as important as physical support during the first couple weeks.
Give lots of hugs especially when the princess is feeling a little emotional. Spend time with her when she is not resting. The more time you spend together the better she'll feel. A lonely princess is a sad princess. Rent a movie she'd like, and watch it together.