He chuckles as she re-offers the jacket to him, and shakes his head. "I dont think this jacket will fit me very well. We are too different" 

He motions to the entirety of his body, clearly referencing the fact that he was nearly two feet taller than she was. A tower in comparison, but relatively normal for a human male. In fact, he follows that up but kneeling down, to be more at her level, continuing the conversation in a gentle hushed tone, "...but if you insist, I will keep hold of it, for now. Until you're ready to take it back."

He pauses to observe her again, "...even with rejuvenate, you seem to be quite tired. But we still must leave. Can you walk to the next town or...I can carry you."