Complex sentence: Following this, the spark is rekindled during the wedding reception and over the next few days, as they elope, thereby upsetting the newlywed's honeymoon & their respective (current) spouses.
Split into simpler sentences: Following this, their spark is rekindled during the wedding reception. Over the next few days they fall in love again and elope, thereby upsetting the newlyweds' honeymoon and their respective (current) spouses.