The phrase "a happy wife is a happy life" suggests that when a wife is happy and content, it tends to have a positive impact on the overall happiness and harmony within a household or relationship. It implies that the happiness and well-being of one partner can significantly influence the happiness of the other and, in turn, affect the quality of their shared life together.
In a similar vein, one could say that a "happy hubby" (short for husband) is also likely to contribute to a happy and fulfilling life within the relationship. When both partners are content and satisfied, they can create a supportive and loving environment for each other, fostering mutual happiness and a stronger bond. Just like the happiness of a wife matters, so does the happiness of a husband in maintaining a joyful and successful partnership. Ultimately, it highlights the significance of both partners' well-being in contributing to a positive and fulfilling life together.