Thor's sleeves are rolled up to his elbows, exposing the gleaming black metal of his left arm. That's likely shiny enough to catch a baby's attention.

He smiles faintly, but his brow is still creased, troubled. "I'm the Allfather. Putting my people's needs before my own comes with the job. Not just Asgardians, but every citizen of the Nine." Therein lies some of the trouble - the woman in question isn't exactly one of his subjects, but if her life was in danger, he would no more hesitate to come to her aid than anyone else.