Complex sentence: Joel and Travis are initially frosty to one another as Joel had disappeared 17 years earlier without so much as a word, but later reveals that their father had made unwanted sexual advances towards Natalie and the two brothers reconcile.
Split into simpler sentences: Joel and Travis are initially frosty to one another as Joel had disappeared seventeen years earlier without a word. He tells Travis that their father had made unwanted sexual advances towards Natalie and the two brothers reconcile.