It is a major red flag if your wife enjoys listening and giving opinions about unhealthy gossips about others. These may include big quarrels, fights, dramatic family matters, or even in-laws related problems. Listening to such gossips and further spreading these as rumours can be really harmful to the targeted person or family.
If your wife displays these signs very clearly, chances are very high that she talks about the problems in your marriage to other people as well. This is when, you really need to have a stern discussion with her.