Must. Even my religion considers household work done by a wife as alms for her husband. Because the wife's job only to serve her husband.

Without involving religion. The husband is obliged to create a comfortable atmosphere for his wife as a leader in the household. Helping him in doing household chores is a form of his love for his wife.

Not weak. But strong. After tired of making a living, then help him at home. Even if you just bring dirty dishes into the sink. Let alone help in all things.

Believe me, the atmosphere in the house depends on the mood of a wife. And made your wife happy is very simply way. It's as easy as saying happy wishes spoken by a husband at the beginning of marriage.