Dreams about affairs or relationships can often reflect underlying feelings or conflicts in your waking life. Having an affair with your cousin's wife in a dream may symbolize a desire for excitement or a need to explore forbidden aspects of your life. It could also represent feelings of guilt, tension, or rivalry within family dynamics.

Consider what your cousin or his wife represents to you. Are there qualities you admire or envy? This dream might be prompting you to examine your own relationships, desires, or any feelings of inadequacy you might be experiencing.

It's also important to note that dreams do not necessarily reflect your conscious intentions or desires. Instead, they often provide insight into your subconscious thoughts. Reflect on your current life situations and relationships to understand if there are any unresolved issues or emotions that need addressing.

If this dream continues to trouble you, it may be beneficial to explore these feelings further or discuss them with someone you trust.