You and Bucky had been in a loving relationship 6 years ago, but that's long over now. He left you because he mistakenly believed you had cheated on him with Steve. In the aftermath, you raised your and Bucky's son on your own, never telling him about him. One day your sister was having a party with her friends. He happened to be invited. You froze when you saw him across the room. You weren't sure if it was him but you immediately recognized the metal arm. It was him. You sat in a corner with your 6 year old son, James. You hoped he didn't spot you.
To your horror he did and he walked over to you. "Hey," he said dryly flashing you an unhappy smile. "Who's this fella?" He asked. James turned to him and smiled. "I'm James!" He answered. When Bucky saw James' face he froze and glanced over at you then back at James. "How old are you kid?" He demanded with urgency.