James's sister is Torrun, an Asgardian princess. But Jake wraps his arms around Kitty and clings to her, because he likes having a pair of older sisters who love him the way these two do. and he knows that she cares.

He closes his eyes, reveling in the care and honesty he knows she feels. James has been lost since... leaving his family? Losing them? Something like that. James misses them like a physical ache.

Jake can feel that ache and being in Kitty's arms helps alleviate some of it. "What are you doing out here?"