"Now you're almost as tall as me," said Diedrich, teasing Cook about her height after she put on her heels.
"No more short jokes," Cook exclaimed.
"Yeah, for today," Diedrich said playfully.
Soon enough, Cook saw a familiar car pull into the driveway.
"Do I get the door?" Diedrich asked Cook and other daughter, Meghan.
"No, no," Cook said.
In a bow tie matching Cook's floor-length teal gown, fellow junior and boyfriend Danny Quian arrived at Cook's home with her corsage in hand.
"Wow, you guys look great together," said Diedrich, admiring the couple.
Her corsage and his boutonnière happened to be nearly identical, though they ordered them separately.
Before meeting Quian's mom and sister at a nearby lake for couple photos, Cook made sure she had time to pin Quian's boutonnière.
"Do I use all three pins?" said Cook, trying not to prick herself.
With the help of Diedrich and her older sister, Meghan, she secured the flowers onto his lapel, drawing laughs from everyone after inadvertently getting pricked.