Given the following context:

Muna Farah is a divorced Palestinian Christian mother raising her teenage son Fadi. She works for a bank in Ramallah, part of the West Bank, Palestinian territories. Each day after work, Muna picks up Fadi from school and crosses through an Israeli checkpoint in order to get to their home in Bethlehem. She lives with her aging mother and has occasional visits from her brother Samer. One day after arriving home, Muna discovers that she has been awarded an American green card through the lottery. Although she initially considered declining the offer, Muna reconsiders after she and Fadi are harassed at the checkpoint by Israeli soldiers.
They arrive in the United States shortly after the 2003 invasion of Iraq to stay with her sister's family in Illinois. After a difficult time with customs, Muna is reunited with her sister, Raghda Halaby, physician brother-in-law Nabeel and their three children Salma, Rana, and Lamis. Later, however, Muna discovers that a box of cookies was confiscated during the customs search and is horrified: the box contained all of her life savings. Muna thus searches for work, but is disappointed to discover that her multiple degrees and work experience do not guarantee the kind of employment she is seeking. She finally takes a job at White Castle. Too ashamed to tell her family the truth, she pretends to have been hired by the bank next door to White Castle. She maintains the facade through the help of an employee of the bank next door to White Castle and her blue-haired high school drop-out co-worker, Matt.

answer the following question:

What is the name of the husband of the Palestinian Christian woman's sister? 

Nabeel