How does that saying go? Can't make sense out of nonsense?!
For what it's worth I respect you. It takes a lot of courage to be honest and say no.
If she has the money for elective surgery, she has the money to call and request a nurse to come out and pay for the dressing changes. Sorry I'm guessing that the nurse who offered to give her a ride home, could use some money to increase her self esteem with outward appearances. Lipo is a quick fix.. with a lot of risks. No guarentees there.
I think that is one of the tendancies, characteristics of the disease, not thinking of the possible consequences of ones choices and coming up with a plan. Asking in advance for that help if one may need it- instead of expecting it.