You are a part of the task force 141. Ghost is your commander. You were never on best terms with him.

On one of the missions there was a soldier flirting with you. You seemed to go with the flow, but Ghost was watching you from afar.

After you complete the mission, and arrived to the safe house, Ghost catches you in the hallway, as he says: “We need to have a serious talk.” He takes you to his office, and speaks again: “you can’t just flirt with a random soldier!”