Is it better for a lover to shout "run away!" when she's about to fart or for her to suddenly try to back or run away without a word?

Only referring to if she is in a small space with you and close
Should she explain to you or would you rather not know why she is behaving so weird.
Let's so she didn't tell you why, how would you receive it and react?
Is it better for a lover to shout "run away!" when she's about to fart or for her to suddenly try to back or run away without a word?
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