Dreams of this nature can be quite complex and often reflect deeper emotions and conflicts within your waking life. Here are some potential interpretations of your recurring dream:

1. Exploration of Desire: The presence of a different man in your dreams may symbolize a desire for emotional or physical connection that you feel is lacking in your current relationship. The flirtation could represent a yearning for excitement or a new perspective in your life.
2. Trust Issues: Given that your husband cheated on you in the past, your dreams may reflect unresolved feelings of distrust or insecurity. The recurring theme of sneaking around suggests that you might be grappling with feelings of betrayal and the fear of repeating past patterns, either in your relationship or within yourself.
3. Frustration and Resentment: Your feelings of frustration and resentment towards your husband in the dream indicate that there are unresolved feelings related to his past actions. These emotions may be surfacing in your dreams as a way to process and cope with the lingering effects of his infidelity.
4. Desire for Freedom: The time away from your husband and kids in the dream may symbolize a longing for independence or a break from your responsibilities. The interaction with the other man could represent a part of you that seeks to reclaim some personal freedom or explore aspects of your identity outside of your family role.
5. Communication and Connection: The friendly or benign conversations with the other man might indicate a need for better communication and emotional intimacy in your current relationship. It’s possible that you are seeking to express thoughts and feelings that you feel are not being addressed with your husband.

Advice: Consider reflecting on your current relationship dynamics and whether there are areas where you feel unfulfilled or need to communicate more openly with your husband. Engaging in honest conversations about your feelings might help to alleviate some of the tension you're experiencing in your dreams. Additionally, exploring your own desires and needs outside of your roles as a wife and mother could provide valuable insights into your emotions and aspirations.