Is it considered polytheism (shirk) in worship or righteous deeds to include the intention of loving one's parents or wife along with the intention of seeking reward from Allah in acts of piety and benevolence through which we draw closer to Allah, and what is the criterion that determines whether an act involves polytheism or not?

A Muslim must intend to draw closer to Allah when entering into worship. Scholars differ regarding one who intends worship and a permissible matter. Most scholars permit this, as the permissible purpose does not contradict worship. Some, however, invalidate the act of worship. Examples of permissible duality include fasting with the intention of worship and healing, and circumambulating the Kaaba with the intention of reward and exercise. Being dutiful to parents and obeying Allah are not duality; rather, they are acts of obedience. Spending on one's wife is an obligation, and its reward increases with the intention of drawing closer to Allah. Praying in the presence of people does not affect the intention, as long as it is not for show (riya') or merely to conform to society. For one whose motive is to pray to Allah, the intention of having been accustomed to it since childhood does not affect it. However, one must beware of making it mere movements without devotion. The mixing of another motive with seeking closeness to Allah reduces the reward. Therefore, a Muslim must purify his intention for Allah Almighty.