According to Islam, a stranger below 2 years old becomes a "blood"-relative to a woman when the woman wet-nurses the baby.

(that's why woman shouldn't simply donate own milk to feed babies.)

So it depends. When did he adopt the son, and did the son drink milk from your friend's wife?

If not, then simplistically, legally no issue with the adopted son to marry with the daughter.

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oh wait.

did you mean your friend married a woman and that boy is STEP son?
if like that, cannot marry lorrr.

This post has been edited by Oltromen Ripot: Sep 6 2022, 03:30 PM