Possible Clues:

• Disgruntled grunt
• Contemptuous snort
• Vocalise quietly, attracting husband’s disapproving grunt
• Sound of disbelief
• Skeptical grunt
• ''Well, I never!''
• Clueless chairman's annoyed interjection
• "If you say so"
• ''I don't like that at all!''
• 'See if I care!'