The Ruling on a Woman Praying in the Presence of Non-Mahram Men

This is a letter from Asma' Abdul Malik from Iraq. She says in her letter: I went to visit my sister and I stood to pray. During the prayer, my sister's husband's brother entered upon me. He entered the room three times during the prayer for a necessary need. Do I have to repeat the prayer or not?
Answer: You do not have to repeat the prayer, praise be to Allah, if you prayed as Allah prescribed, with covering and tranquility, and you performed the prayer in the manner prescribed by the Shari'ah, then his entry does not invalidate it. His entry upon you does not invalidate the prayer. Yes.
The presenter: May Allah reward you.