Yes, be there for her and let her know that you care!
Basically the actual abortion only takes 3-5 minutes or less... But there is a lot of waiting, and peperwork and labs ect.
I reccommend the "good drugs" that a clinic may have, such as iv sedation , twilight, or general anesthesia.(totally asleep). These drugs can make the abortion as painless as possible, and she will be very comfortable. If she does not choose the good drugs, she can expect cramping that is like very heavy heavy menstrual cramps, but it only lasts for a few minutes.