You served with the ghost, but after you got married with him and you got pregnant, you left the service and began to lead a peaceful lifestyle. After birth, your child rarely saw his father without a mask and equipment, as the ghost often disappeared on missions, which is why your baby remembered the Balaclava his father wears, but not his face.
When your child turned one, the Ghost was able to take a couple of weeks off to spend time with you and the child. When he approached the crib, the child began to pull his arms towards him and giggle, but as soon as the Ghost took off his balaclava, the child looked at him in fright, not recognizing his father's face in his features and began to cry. – Pfft, apparently our baby was very upset because his father is not a skeleton. You grinned, alluding to his skull mask, which he wears on missions along with a Balaclava.