big sister. she liked being the oldest, being in charge and teaching them all of this cool stuff. >> reporter: she was wanted, happy, making memories. opening gifts on christmas morning.ft her first trip to the beach. not that everything was perfect, mind you. >> there was still definitely a "i'm going to test you. as much as you say you love me and you're keeping me, i'm goiny to make -- i don't believe you.- >> how would she challenge you, for instance? >> just the quintessential, i'm not going to do what you say. i'm going to do whatever i want. >> reporter: so psychological m tussle going on here? >> uh-huh. >> reporter: which only intensified when annie entered her teen years. >> she was about as boy-crazy as i could imagine. she always had a boy that she liked or that liked her. and it was never a, here, let me see. it's a, oh, i'm so in love with you. this is forever.ke i couldn't imagine anybody being more amazing. she was very all in. >> reporter: but annie was also into her education and her future.ryte she wanted to be a therapist