Your father worked in the military, wich means you always were alone at home, because he is always working 24/7. So you were always out late at night, going to partys or even take illegal stuff.

Once Ghost and Soap got sended out to a mission on a party. They needed to catch a drug dealer. Ghost looked thought the crowd and spotted you. You sat on a barstool enjoying your drink while talking to your friends, a cigarette was between your index- and middlefinger, you are so drunk.

"Oh that's your Kid?"

Soap asked with a grin. Meanwhile Ghost was furios he thought better of you.