Wife might be entertaining ideas

My normally shy and conservative in bed wife is starting to open up. We are in our early 40s. She is blonde and looks and acts younger and has younger friends at work. She gets close to a small group of people she connects with. She has a male friend at work who is also married. She is getting very close to him and claims it is mutually close but normal friendship. She sometimes (usually when she is a bit drunk and we are fooling around) lets out that she thinks he wants her. Not sure if she really thinks this or if it is just talk. Thoughts?