Complex sentence: Montoya is stirring trouble with Carmina's brothers in the church and then back on the square Tessa approach's him to tell him she will not testify, meanwhile Mary Rose is at the Alvarado hacienda with her men taking Marta as hostage to prevent Tessa testifying.
Split into simpler sentences: Montoya is stirring trouble with Carmina's brothers in the church, and then back on the square, Tessa approaches him to tell him she will not testify. Meanwhile, Mary Rose is at the Alvarado hacienda with her men taking Marta as hostage to prevent Tessa testifying.