Alright,
Listen junior, I'm gonna be nice cause ur asking for help ok?
Look, that is ur godda#n house ok? Forget the fact that ur 21. You are a MAN and you need to defend ur homefront, doesent matter if ur sister is a nice girl or a slut. Grab a baseball bat and break the ****i$g door down and threaten to kill these pieces of shiite that have no respect for YOU. They are probably asking ur sister if the geek on the computer can hear.... If you have to, break a couple of ****i$g legs with the bat. It's not like these coc$ suckers are gonna call the cops....
When mom and pop get home tell em' ur sister and you were playing aroung and broke the door, it's not like she's gonna rat on you.....
Take a stand brother!!!! Otherwise you will be ravaged upon for life....do unto other's before they have a chance to do unto you...
Fuc$ em!!!!
