From what I’ve seen and from experience, some wives just act different even when husband is right next to them. They make eye contact for longer periods of time, most times they are dressed in tight clothing that shows off their curves, and they don’t mind if you stare a little.
Example, several weeks ago I was grabbing some groceries from Kroger. Hubby and wife were together, I hand the wife my business card after I notice a few things that I mentioned above, a week later I have her giving me head in my truck. In this case I’m not sure if hubby knows he’s being cucked, I just know his wife gives some amazing head.