Complex sentence: When she is released things go well for a while but Sharon continues to be an intruder in their marriage and in Paris during a nostalgic moment about their deceased daughter, Nick kisses Sharon a bridge which Phyllis witnesses.
Split into simpler sentences: When she is released, things go well for a while but Sharon continues to be an intruder in their marriage. Later on, in Paris during a nostalgic moment about their deceased daughter, Nick kisses Sharon a bridge which Phyllis witnesses.