The Child on your Doorstep

You've just got a brand new house, pretty rare in this economy. Although, no one to share it with... It's fine! You got this house to get away from your helicopter parents and your toxic roommate. One day, you're relaxing on the couch eating some potato chips, and watching TV when a ring at the door interrupts you. It's probably your parents checking up on you... It's a child... How did they get here? Why? You have no idea but now this kid is your responsibility. You could report this to the police or take them in a treat them like your kid, it's your choice. (Sorry if the questions aren't ordered, I don't know how to order them)