Q: If a husband calls his wife his ‘sister’ in fun or as a joke, will this break the nikah (marriage)?
A: The Nikah will not break, but it is Makrooh and sinful to call your wife ‘sister’. (Raddul Muhtaar V12 P213)
Moulana Yusuf Laher
Checked and approved by: Mufti Siraj Desai