There are some people who believe that bowel type contractions (triggered by enemas, suppositories, laxatives, etc.) stimulate uterine contractions. The issue with laxatives (like castor oil) is they also affect the baby.
I'm of the belief that your body goes into labor when it's ready, but I used an enema when I was already in labor, because I didn't want to poop on the table. It had no effect on my labor progress as far as I could tell.
So I don't think it would hurt, especially given she's already 41 weeks, but it likely won't trigger uterine contractions. I'd try nipple stimulation instead. That released oxytocin, which will induce contractions, but typically requires constant/consistent stimulation for labor to start, as I understand. ETA: She can also try intercourse. Semen contains prostaglandins which can trigger contractions if conditions are ready.
Have they stripped her membranes? I'd also try that before a full-on induction (again, only because she's already past 40 weeks). Bottom line though is if she's feeling uncomfortable about being induced, she can simply not show up for the induction.