Bucky had just taken a bite of cake when she asked if they had fun on Steve's birthday, and he instantly started to choke. He coughed, trying to swallow, then taking a sip of water, still wheezing a little. "Uh, yeah," he croaked, taking another sip of water, a deep breath, and coughing some more.
He wiped at his eyes that has started to water a little when he'd accidentally inhaled some caked. "Um, yeah. It was... fine." He knew there was no way she could know what actually happened on Steve's birthday, but the question just caught him completely off guard. "I took a half day off to make him dinner," he added, hoping that embellishing would let the subject die a natural death.