The relationship between a husband and wife is something specific to them and it is unbefitting of any party to divulge information about marital relations to anyone else. The privacy of this relationship should be honored and respected by each spouse taking into consideration that the Prophet (peace and blessings be upon him) warned against divulging information about these marital relations to others.
In this regard, Sheikh Ahmad Kutty, a senior lecturer and an Islamic scholar stated:
Marriage in Islam, as it has been referred to by Almighty Allah in the Qur’an, is a solemn contract that the parties should honor and respect, and this includes respecting the privacy and confidentiality of each spouse.
Therefore, it is clearly wrong for a spouse to divulge matters that are related to spousal relations to anyone else. The only exception is when it is a clear case of spousal abuse, where one is allowed to disclose certain matters and that also, only to the extent required and only to those who are in a position to restore or redress these issues. In all other cases, it is indeed a most heinous sin to do so.
Therefore, if a husband is divulging such matters to his relatives such as his sisters, maternal aunt etc., he is clearly violating the rules of Islamic ethics governing the husband and wife relationship. Islam clearly forbids divulging such matters to anyone. By doing so, the individual is exposing himself to the wrath of Almighty Allah, for the Prophet (peace and b blessings be upon him) says, “One of the worst of men (in the sight of Allah) is he who, after having intimate union with his wife, talks about it to others.”
In another tradition, the Prophet (peace and blessings be upon him) once asked his companions, “Perhaps some of you men establish conjugal relations with their wives and talk about it to others; perhaps some of you women speak about your relations with your husbands with others?” When they remained silent, he said, “To do so is no different from that of a he-devil copulating with a she-devil in public view!” In other words, Islam considers it as a form of abominable behavior that does not befit a believer or a decent human being.
As for the story of `A’isha bint Talha who was said to have described conjugal relations of her husband Umar bn Abdullah, it could probably be found in some literary books which collect weak and fabricated accounts together with authentic ones, and thus it needs to be historically verified in a scholarly critical approach. Anyhow, our only example is the guidance of the Prophet (peace and blessings be upon him) who has enjoined us to observe shyness and modesty.