I have not come across a case of forced marriage involving a 16 year old. They went back home, so why would the mother force her to get married? None of the dhaqan celis girls I knew were forced to get married, after a few years of living back home they chose to get married and returned back to UK with a failed marriage behind them.
The hiding part is so exxagerated, Somalis are not Pakistanis, her mother is not going to harm her. I would not refer to a relative I did not know as uncle, out of respect yes, but he is actually not her uncle. Dont get me started on the hijab part, a muslim woman's story is never complete without the hijab.