Prohibition on describing the charms of another woman to one’s husband
Question

                Is there any hadeeth narrated from the Prophet (peace and blessings of Allaah be upon him) which forbids a wife to tell her husband of the charms of another woman?.
Praise be to Allah.Yes, that was narrated 
      from the Prophet  (peace and blessings of Allaah be upon him). 

    It was narrated that ‘Abd-Allaah ibn Mas’ood (may Allaah be 
    pleased with him) said: The Prophet  (peace and blessings of Allaah be 
    upon him) said: “No woman should look at or touch the body of another woman 
    to describe her to her husband.” Narrated by al-Bukhaari, 5240. 

    Al-Haafiz Ibn Hajar said: 

    Al-Qaabisi said: The reason for this prohibition is the fear 
    that the husband may like the description and that may lead him to divorce 
    the woman who gave the description or be tempted by the woman who was 
    described to him. 

    Fath al-Baari, 9/338; ‘Awn 
    al-Ma’bood, 6/132; Fayd al-Qadeer, 9723. 

    And Allaah knows best.