Complex sentence: In the morning, Layne comes by to hang out with Claire and Chris tags along, revealing that he is Layne's older brother and Claire learns Chris has a girlfriend, unbeknownst to Massie.
Split into simpler sentences: In the morning, Layne comes by to hang out with Claire and Chris tags along. He reveals that he is Layne's older brother and Claire learns Chris has a girlfriend, unbeknownst to Massie.