Why did another woman catch an attitude when I questioned her about calling my husband's phone?

My husband left his cell phone at home (in my possession). While he was out a woman called for him. She said he buys movies from her. So I asked had he contacted recently (trying to find out if she was just calling to solicit or if she was returning his call). She had the nerve to catch an attitude with me and put her husband on the phone as if to prove something. It just boggles my mind that a woman would catch an attitude with me because I questioned her call!! What do you think? Have you dealt with similar situations?