Muhammad taking his son's wife
Allah has not placed two hearts within any person, nor has He made your wives, whom you equate with your mothers, truly your mothers. Likewise, He has not made your adopted sons your actual sons. These are mere words from your mouths, but Allah speaks the truth and guides to the right path.
33:4Allah hath not assigned unto any man two hearts within his body, nor hath He made your wives whom ye declare (to be your mothers) your mothers, nor hath He made those whom ye claim (to be your sons) your sons. This is but a saying of your mouths. But Allah saith the truth and He showeth the way.