He isn't crying, the strange water on his face must be from rain, though he didn't understand how it could be raining inside a gymnasium. Perhaps it was perspiration, that would explain why it was salty where the liquid touched his lips, but he most definitely was crying. He had everything in control, he was perfectly calm and composed. At least, that's what he said when Sasha tried to console him while wiping away tears of her own. Tony wasn't much better off, dabbing away tears of his own discreetly and leaning closer to Pepper to whisper something in her ear.
This day was supposed to be a happy one, so why did he feel like he was losing something? He watches his baby girl walk up onto the stage when her name is called, her smile big as she pauses on the other end of the stage for the photographer to do his job, the flash of the camera bright and illuminating the little black case she held in her hand. It was a tiny thing with silver letters imprinted on the front of it proclaiming the school's name and their mascot. Addison is done with high school, she'll be moving on to college soon, his baby had grown up right under his nose and he didn't realize it until the moment she came into the living room of Stark Tower dressed in her graduation cap and gown.
He didn't like these conflicted emotions, he'd rather just have one to deal with at a time instead of all of them hitting him at once like a punch to the stomach. Happiness, sadness, stress, nerves, all of them were working on his stomach and making him wish he could hide Addison in a bubble where she would always be safe. "Are you okay," Sasha asks, handing Elijah off to Clint, so that she could dab the tears from Loki's face. Loki was trying to keep it together, honestly he was, but the second he looked into Sasha's red-rimmed eyes, he lost it entirely. He falls into her arms, clutching her tightly and all-out bawling as Sasha does the same.
Their little girl is all grown up.