"The mask...?" He sidles a little closer, until he can reach up and gently investigate the mask with his forelegs. "You didn't wear anything like this in the dream. What does it mean?"

Her shivering is making his spark ache. He can't just leave her like this. He sidles even closer and, when she doesn't immediately rebuff him, presses himself close to her chest.

Real spiders are ectotherms, but a Cybertronian spark burns in Tarantulas's thorax. If she lets him in close, he can absolutely keep her a little warmer.