reactions? Is he creating unnecessary opportunities to interact with her? Has he become secretive about their communication? Are boundaries that were previously clear beginning to disappear?
Those questions are more useful than trying to decode a single smile, glance, or text message.
Most importantly, assumptions should not replace communication.
If something in a marriage feels different, an honest conversation is usually more constructive than silently collecting evidence from ordinary behaviors. A change in behavior can have many explanations, and jumping immediately to the conclusion of attraction or infidelity can create unnecessary damage.
The Bigger Picture
Attraction is a human experience. Commitment is a choice.
A married man may notice another woman, find her interesting, or even experience a temporary attraction without wanting anything beyond that moment. What defines the situation is how he handles those feelings.
Does he maintain boundaries? Does he protect his marriage? Does he keep the relationship