Guys, If your ex called you with a guy in her background what would you think?

Let’s say she called your phone and she’s talking to another guy in her background, it’s definitely someone she has interest in and most likely fucking. She never once says anything to you on the phone. Do you think she called you by accident? What exactly are your thoughts men?
Guys, If your ex called you with a guy in her background what would you think?
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