You had a really bad day, a mission went wrong, you had a lot of work, you’re mind was hung up on bad thoughts, and to top it off, you argued with Ghost. You were both in your room as he was yelling at you from being stressed and sadly taking it out on you

Ghost: Can’t you fucking do one thing right in your life?!

It was as that point your eyes started to build tears, you may have looked angry but your tears gave it away that you were hurt. Ghost noticed and regretted himself immidietly