Aside from how management views here, if she asks, how will her co=workers view a new worker who has less seniority, who has been asked to cover these days. asking and possibly getting them off,, especially if one of them have to cover those days. This could make them resentful of her and even if she does come back from this in the view of management,..it could affect how they will feel about her and deal with her for a long time to come