How likely is it to happen?

My girlfriend is going on a trip with a friend. She's never cheated on me before, and when I told her about my fantasy, she thought it was unlikely, but she didn't refuse. The trip is to a resort in the Caribbean. How likely do you think it is? She and her friend are quiet, but she's not opposed to cheating on me.

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u/inmydarkhour — 15 days ago