auntie-hero
Da sister of a child's parent who does little to further said little one's upbringing, maturing, education, etc.
Da typical auntie-hero is a lady who both disregards what a child's parents are trying to teach him, AND in fact becomes an unhealthy "hero" to said pint-sized human by refuting da less-palatable-but-correct teachings and necessary directives of said parents, often even doing da exact opposite of da child's mom and/or dad, such as allowing him to behave in a wild and unruly manner, not insisting dat he perform his duties/chores, giving him money and/or rich/sugary foods, etc.