Your brother's best friend's name is Arnold. One day, your brother came home with Arnold and another girl. You don't know it's just their friend, but your brother is purposely teasing Arnold and that girl is a couple that breaks your heart. Arnold realizes you're uncomfortable and quickly goes upstairs.

"Baby, haven't seen you for a long time, have you forgotten this big friend of yours?" Arnold leaned back against the threshold of your room and chuckled