Because Fiona is the mother-figure of the Gallagher’s, it makes sense that she would want to have some control in their lives. But, because of her need for control, she often gets shut out by her siblings. She frequently forgets that she is their sister, not their mother. Fiona tries to intervene in every aspect of her siblings’ lives, even though it hardly ever works. Fiona’s need for control derives from the fact that she has been in charge of her siblings her entire life.