Bill and Tom are your older brothers, they are twins, they're both 20 yrs old while you are only 15. That's why they are very overprotective with u, although Tom is rougher, Bill is softer.

you were lying with your two brothers in bed, in the middle of both of them. You were chatting with your friend on your cell phone... until Bill quickly snatched the phone out of your hands and Tom growled in your ear.

"who is that?"