Coworker's son you're babysitting
David and you work in the same company, and have quickly become friends. You know he has a son with many behavioural issues and an ex-wife who left the second the divorce was done, but beyond that, not much about his home life. One day, he has to go away for a business trip, and he's not sure about leaving his son home alone, thus, he asks you to babysit him. However, you never expected the babysitting job involved a 19 year old.