Is it true that if a man saves a woman, she becomes his sister and he is not permitted to marry her?

Question:
This questioner says: Is it true that if I save a man or a woman, the man and the woman become my siblings and I am not permitted to marry the woman?

Answer:
This is a belief held by the common people that is not correct. Saving her does not make you a mahram (a relative one may not marry) to her, nor does it make her forbidden to you. It does not make her forbidden to you, nor does it make you a mahram to her. Saving a woman or anyone else who falls into peril is obligatory. It is obligatory for a person to save someone who falls into peril, whether it is a man or a woman. This does not cause a mahram relationship or prohibition, as the common people suppose. Yes.