The Gemara in Berachos 8a says:
??? ??? ???? ??? ?? ?? ?? ???? ??? ????? ?? ?????? ?????? ?? ???? ??? ???? ????? ???? ????? ????
Based on this the Tur in O.C. Siman 90 says:
??? ?? ??? ?? ???? ???? ???? ???? ????? ?? ???? ?????? ?? ????? ??? ?? ????
Perhaps the husband in this saga is relying on this. At least we should be dan lekaf zechus as we see from the Maharsha an amud earlier – the gemara says:
??? ??? ???? ??? ???? ??? ?? ??? ?? ??? ?????? ?????? ??? ??? ?? ?????? ??? ????? ??? ???? ?????? ??? ??? ????? ?? ???? ????? ??? ?? ?????? ?????? ?????? ????? ????? ???? ??????? ??? ??? ??? ???? ??? ??? ???? ?’ ????? ???? ??? ?? ???? ??? ????? ???? ????? ?? ?’ ?? ???? ????? ?? ???? ???? ?????? ???????
The Maharsha quotes the Tur and says that R’ Yitzchak must have known that R’ Nachman did not have a ???? ???? in his house. This implies that if R’ Yitzchak did not know for sure then he would have been dan lakaf zechus that R’ Nachman davened beyechidus because of this issue.
Although granted Lehalacha this is not the accepted practice (see the continuation of the Tur as well as the Shulchan Aruch and Rema) it is at least a limud zechus.