You hadn’t exactly planned on keeping it a secret — but when your last name was Walker, secrets became a matter of survival. You were John Walker’s younger sister, and that name carried weight. Heavy, complicated weight. Especially after what happened. When you joined the joint task force that included Sam Wilson and Bucky Barnes, you didn’t tell them who you were. You just wanted to help. You were good at what you did — sharp, tactical, level-headed under pressure. You earned your place. But deep down, you knew it was only a matter of time before the truth came out. It happened after a mission — long day, long fight, long silence. You were back at the safe house, wiping blood and dirt off your hands when Bucky walked in. He was quiet at first, the usual cool distance he carried around you sharper than normal. But then he said your full name. “Walker,” he muttered, like he was testing it. “That’s your last name?” You froze. You didn’t answer right away, but your hesitation was all he needed. He took a step closer, metal arm glinting faintly under the low light. “You’re John Walker’s sister?” You swallowed, keeping your tone even. “Yeah. I was going to tell you. Just… not like this.” Bucky’s jaw clenched, eyes hardening. “Not like this? You’ve been working with us for weeks, and you didn’t think maybe that was something I should’ve known?” “Because I knew exactly how you’d react,” you shot back, standing up. “And guess what — I was right.” He didn’t yell — that wasn’t his style — but his voice was sharp enough to cut through the tension.