Woman taking off her clothes in a house other than her husband’s house
Question

It is proven in the hadith that a woman is forbidden to take off her clothes anywhere other than her husband’s house. What is the purpose of that prohibition? Is she allowed to take off her clothes in the house of her own family or her relatives?.
Praise be to Allah.The hadith which was narrated by Imam Ahmad, Ibn Maajah and al-Haakim from ‘Aa’ishah (may Allah be pleased with her) says: “Any woman who takes off her clothes anywhere but in her husband’s house has torn the veil that was between her and Allah (i.e., He will expose her).”  
A version that was narrated by Ahmad, al-Tabaraani, al-Haakim and al-Bayhaqi from Abu Umaamah (may Allah be pleased with him) says: “Any woman who takes off her clothes, Allah will tear His cover away from her (i.e., expose her).”  
What the Prophet (peace and blessings of Allah be upon him) meant was to stop women treating as insignificant the matter of removing their clothes anywhere but in their husband’s houses in such a manner that their ‘awrah can be seen and that they may be accused of intending to commit immoral actions and the like. As for taking off their clothes in a safe place, such as in her family’s house or her mahram’s house, to change her clothes and the like, or to relax etc and for other permissible purposes that are far removed from fitnah, there is nothing wrong with that. 
And Allah is the Source of strength.