The Husband's Father Is A Mahram For His Son's Wife
Islamic Rulings -
Living Shariah Verdicts
Islamic Questions & Answers
Is it permissible for my wife to shake hands
with my father?.
Praise be to Allaah.
Yes, that is permissible, because when a man makes
a marriage contract with a woman, his father becomes a
mahram for her, as does his son from another wife. And
her mother becomes a mahram for him, as does her
daughter from another husband.
This is called a mahram by marriage.
The evidence that the husband's father is a mahram for
the son's wife is the verse in which Allaah mentions
the women who are mahrams (interpretation of the
"the wives of your sons who (spring) from your own
So the wife of the son is a mahram for her husband's
The evidence that the husband's son is a mahram for
his father's wife is the verse in which Allaah says
(interpretation of the meaning):
"And marry not women whom your fathers married, except
what has already passed"
The evidence that the wife's mother is a mahram for
her daughter's husband is the verse in which Allaah
mentions the women who are mahrams (interpretation of
"…your wives' mothers"
These three (the husband's father, his son and the
wife's mother) become mahrams as soon as the marriage
contract is done, and that is not subject to the
condition that the marriage be consummated.
With regard to the wife's daughter, she does not
become a mahram for her mother's husband unless he has
consummated the marriage with her mother, because
Allaah says (interpretation of the meaning):
" and your stepdaughters under your guardianship, born
of your wives to whom you have gone in — but there is
no sin on you if you have not gone in them (to marry
The stepdaughter (rabeebah) is the daughter of one's
See al-Mughni, 9/514, 524.
In conclusion: the husband's father is a mahram for
his son's wife, so he may shake hands with her and be
alone with her and travel with her. See questions no :
5538 , 20750
And Allaah knows best.