Complex sentence: Back in Orange County, Shaun's parents seek out each other in how to deal with Shaun's problem and end up reconciling, realizing that they are much happier together than with their respective new spouses.
Split into simpler sentences: Back in Orange County, Shaun's parents seek out each other to determine how to deal with Shaun's problem. They end up reconciling, realizing that they are much happier together than with their respective new spouses.