“Scott, you’re my brother. Alright, so if you’re gonna do this, then I think you’re just gonna have to take me with you.”
“Stiles, if you have it, we’ll do something. I’ll do something.”
See how much they care about each other. You know Scott and Stiles would not be able to live without each other if one of them died, so Jeff will definitely not kill Stiles or Scott off.