Can a real brother could kisses and hug to his real sister or not? Can a real son could kisses and hug to his real mother or not?
بسم الله الرحمن الرحيم
(Fatwa: 632/627=M)
Though one does not fear shahwah (lust) while kissing or hugging his sister or mother, but it should be avoided completely since it may lead him to it.
Allah knows Best!
Darul Ifta,
Darul Uloom Deoband