They're lost and stuck on a snowy winter day on a plain. Perhaps they've been there several days waiting for help. She's saying she's not afraid, but he knows she is afraid of him dying first and leaving her alone, so he's going to help her out of that situation by killing her first so that she won't be left there to die alone after he dies.
They're lost and stuck on a snowy winter day on a plain. Perhaps they've been there several days waiting for help. She's saying she's not afraid, but he knows she is afraid of him dying first and leaving her alone, so he's going to help her out of that situation by killing her first so that she won't be left there to die alone after he dies.