<div>I do not want to again bring up the topic of negiah and derech chiba which has been discussed many times. However, i am looking for sources on its application to relations by marriage, e.g. son-in-law and mother-in-law or daughter-in-law and father-in-law. </div>
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<div>A specific example. In a home on friday night, where the father's minhag is to give the birchat habanim and banot by placing a hand (or both hands) on the head of the child, can he do so with his daughter-in-law? I could not find sources. Any help or ideas?</div>
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<div>David I. Cohen</div>