It appears so.
"Since then Muthana has said that she has regretted her decision to join the group, when she left the US at 19-years-old and headed to Raqqa in Syria via Turkey, where she would first marry an Australian jihadist and then a Tunisian man.
Both died fighting for ISIS, and she secretly married a Syrian, The Guardian reveals.
It sounds like an episode of 90 day fiance.