That's a hard one. There are so many variables that are involved with family dynamics. I would say that it depends on the relationship with the particular family member. I would be fine asking any of my immediate family, even though a few of them have become village idiots. My husband, however, would be hard pressed to ask one particular brother who we never want to see again.
You would like to think that your family has your back, but in real life, that's not always the case.