My little sister has a horrible toothache?!?

At about midnight, my sister was lying in bed while I was talking to friends online, and she started complaining about her tooth hurting. I told her that maybe it was going to fall out because it's happened to me before. She said that it has a filling in it. Now, at 12:26 am, she is crying in pain as her tooth starts to hurt more and more. My dad is asleep. We would wake him up but he has to wake up for work in like 5 hours. And he sleeps with my step-mom and my step-brother and I don't want to wake them up to. She wants ME to do something! Is there anything I can do or put on it to make it ease the pain? Help!