Dreams involving feelings of jealousy, betrayal, and conflict, especially regarding loved ones, can be quite distressing. In your dream, the presence of your sister flirting with your husband may symbolize feelings of insecurity or fear of losing your partner's affection. The aggressive actions you take in the dream could represent your frustration and anger about the situation, as well as a desire to assert control over your feelings of helplessness.

Your sister's calm demeanor in the dream might reflect a perceived lack of accountability or concern for your feelings, amplifying your sense of betrayal. The recurring themes of infidelity and confrontation suggest that there may be underlying anxieties in your waking life that need to be addressed.

Consider reflecting on your current relationship dynamics and any feelings of neglect or insecurity you might be experiencing. Open communication with your husband about your feelings can help alleviate some of these anxieties. It may also be beneficial to explore your relationship with your sister and any underlying tensions that could be contributing to these dreams.

Dreams often serve as a mirror to our subconscious, so addressing these feelings in your waking life may help reduce the intensity of these dreams over time.