Ruling on shaking hands with one's grandfather's wife

Question:
A message from one of the listening brothers named Bakri Ahmad, containing a collection of questions, asks about shaking hands with a number of women, describing them as follows: Please direct me regarding shaking hands with one's grandfather's wife; is it permissible or not?

Answer:
Shaking hands with women, if they are mahram (relatives one may not marry), is permissible, and there is no blame in it. One's grandfather's wife is a mahram; your father's wife, your grandfather's wife, and your great-grandfather's wife are all mahram. Likewise, your sons' wives, your daughters' sons, and your sons' sons; they are all mahram.
As for your brother's wife, she is not a mahram, so do not shake her hand. Likewise, your uncle's wife, your maternal uncle's wife, and your cousin; they are all not mahram. Likewise, your neighbor and your neighbor's wife; they are all non-mahram, so do not shake hands. However, there is no objection to greeting; the greeting is prescribed by speech: "As-salamu alaykum" (Peace be upon you)... "Wa alaykum al-salam" (And upon you peace)! How are you? How are your children? All of this is good; this is prescribed.
As for shaking hands, no, do not shake hands except with one who is a mahram to you; because she is your sister, or your daughter, or your mother, or your paternal aunt, or your maternal aunt, or your father's wife, or your grandfather's wife, or your son's wife, or your son's son, or your daughter's son; they are all mahram, yes.

The presenter: May Allah reward you with good.