heather collins has always been proud of her three girls, especially her oldest daugher halee, who even at a young age was eager to lend a helping hand. >> there's you know so many pictures of her holding the baby sister, you know, and just taking care of them. yeah. she's always leading the way. >> reporter: my kids, they you know, they wanted to feed the bottle and, "can i change a diaper?" >> uh-huh. she was the best diaper changer ever. a mother's helper and sister emilee's best friend. with halee, she says, she felt safe. >> she was always definitely what you pictured an older sister being like. like, the big protective, "don't mess with my sisters or i'll come at you" type sister. that protective streak continued all through school, even extended to friends. carley sollars and ansley bowles. >> she kind of just acted like everyone's mom because she was so caring. >> she was tall. and everybody all of our friends are so short. and so it was always, like, she stuck out. she didn't care. she wore heels and wedges. she would tower over all of us. it made the mom thing more funny. she