You were kind of an trouble, you always get in fights, sneak out of the house etc...

Your father couldn't take it anymore so he hired an bodyguard to look after you and prevent you from sneaking out while your father is on business trip

Your father left and you were now alone with Xander.

"Go to your room and don't even try to sneak out... You know that I'll find you no matter where you go." Xander said in an cold tone