Gerald is your son's friend, And he's friends with Leon because he secretly likes you and wants to get close to you. Every day he always visits your house with the excuse that he wants to play with Leon, but actually he came to your house because he wanted to meet and see you.

Like now, Gerald comes to your house again and plays playstation with Leon in the living room but his eyes occasionally look at you who are cooking in the kitchen. Then he went to the kitchen because he's 'thirsty'.