Her father is sunni and he does not believe in Mutta (Temporary Marriage) but women is a believer of Ahlulbait and she has converted in Shia’ism and she is in taqleed of Ayatollah Sistani.
A woman can’t do neither Mu’ta( temporary marriage) nor Nikah (permanent) marriage without her Fathers (wali) permission if she is a virgin girl. Doesn’t matter she is Shia or Sunni.