Complex sentence: The pair embarked on an illicit affair which encountered several difficulties, the most strenuous of which included Gabrielle's mother in law, Juanita, who is introduced in episode 1.05 ("Come In, Stranger").
Split into simpler sentences: The pair embarked on an illicit affair which encountered several difficulties. The most prolific of these difficulties including Gabrielle's mother in law, Juanita, who is introduced in episode 1.05 ("Come In, Stranger").