[Eyebrow. Someone didn't escape learning sarcasm, between Loki and Tony. Thor's a generally quick study.]

Ah, I had thought that 'mother' was a title of respect for women of repute, or those who had borne children. Evidently I was mistaken, and I bow to your greater knowledge in the area.

[He's going to call you Theresa forever now.]

Approximately three weeks ago, near to the beginning of this month.