That's answer enough to his question. She's not going to make him trust her acting like this, and he's not going to hang around to be trapped. Not even if there's warmth and food on offer.

He moves all of a sudden, going for the window. He's going at full pace, using his metal arm to smash the glass as he propels his way through it and drops like a stone to the street below. Maybe she'll follow him, and maybe he's not as fast as he could be with his leg hurt, but he's still pretty fast as he runs for it.