you might advise her to get her gallbladder checked out.
Vomiting bile (can be yellow colored or
green) is sometimes not a cause for concern, as if her stomach was empty when she threw up....this would be the reason for bile to come up. Like I said, if all is fine now...no more issues, Id say she is ok....but if it starts happeneing on a normal occasion, might check it out to be safe.