You hear a text alert

As you stand there, admiring the fuzzy outline of your wife, the sound of a text alert pulls your attention to the bed. You push the bathroom door shut, quietly, and walk over to Jenna's phone: sitting on the bed on top of her jogging tights.
Jenna's phone is set to display texts on the lock screen, so you can see the message pretty clearly. You'll let her know when she gets out of the shower if it's import.....
You look closer. The text message reads,"You around? I've been thinking about you." the text is from someone that Jenna hasn't added as a contact, so it's just the number, no name.
Your blood runs cold. Your palms start sweating. You've never really had a reason to suspect Jenna of being unfaithful. You try to tell yourself that the text might have an innocent explanation.