If anybody sucks milk of his wife intentionally or unintentionally, will their marriage be nullified?
Answer:
(Fatwa: 2510/2064=B/1429)
The Nikah is not nullified by sucking the breast of wife, but it is unlawful to drink the milk, one must refrainn from it.
Allah (Subhana Wa Ta’ala) knows Best
Darul Ifta,
Darul Uloom Deoband