Related Clues:

• "I'm not kidding!"
• With sincerity
• Faithfully
• "Seriously"
• Mom's tough emphasis
• 'I kid you not'
• "Trust me!"
• Honourable, true
• Sincere, upright
• Trustworthy or candid
• Honorable and sincere
• Honorable, true
• Truthful and dependable
• Open and truthful
• Not disposed to cheat