As I am an Indian and as someone who actually is interested about customs and traditions, it is usual for a daughter-in-law to wash the feet of the husband's p

As I am an Indian and as someone who actually is interested about customs and traditions, it is usual for a daughter-in-law to wash the feet of the husband's parents BUT NO in terms of drinking it. But please READ the following to have a complete understanding so there is no misunderstandings. Washing somebodies feet is a mark of respect in the Indian tradition, followed which a couple of DROPS is just sprinkled on the head as a sign of humility. Its is common is very traditional families to wash the feet of the elders as a mark of respect daily. Ofcourse, the feet is cleaned prior to this. No one washes dirty feet. Among Hindus, we do bath the deity (its another misconception to call it an idol) with water and the water is only sprinkled on people as the water is considered holy. After which the deity is bathed in honey, milk, fruit juice as offerings, which is actually consumed by people as prasad (a devotional offering made to God). Sometimes, if there is nothing special, even water is offered. The point I am trying to stress is that the water for bathing is different from that of offering. The deity is kept in a clean places. That being said, people ignorant of the customs do commit mistakes. There are many misconceptions among Indians on various matters especially in rural areas. But drinking the water that she used to wash is not heard of.