If "caught" you can laugh it away.

Casual examples: (Context doesn't matter I'm saying how you can play off the situation, you take her shopping and she takes a long time and you talk with a random girl)

She says you were flirting with her weren't you so I'd leave? He has that "I'm cAught" look on his face and goes "maybe..." She smiles

My friend does the intentional shifty eye look and "gets caught". Girl goes: I know that look! You're hiding something! He laughs, and she laughs and looks at him and bites his lip.

It's a conversation killer to just say yes or no. Even if "getting caught"