Complex sentence: Kay tries to comfort Connie when she accuses Michael of murdering her husband and ordering the other executions, and she is relieved when he eventually denies it, but when the capos arrive they address her husband as Don Corleone.
Split into simpler sentences: Kay tries to comfort Connie when she accuses Michael of murdering her husband and ordering the other executions, and is relieved when he finally denies it. However, when the capos arrive they address her husband as Don Corleone.