Complex sentence: Mateen remarried to Noor Zahi Salman, who was listed as Mateen's spouse on a St. Lucie County mortgage document from September 2013, which showed that they moved into a house in Port St. Lucie with Mateen's father and another one of his relatives.
Split into simpler sentences: Mateen remarried to Noor Zahi Salman, who was listed as Mateen's spouse on a St. Lucie County mortgage document from September 2013. The document also stated that the couple moved into a house in Port St. Lucie with Mateen's father and another one of his relatives.