Complex sentence: According to the Season 2 DVD featurettes, her husband was suffering health problems during the shooting of the first season, which inspired her character's story in the Rose/Bernard-centric episode, "S.O.S.".
Split into simpler sentences: According to the Season 2 DVD featurettes, her husband was going through health problems during the shooting of the first season. Her husband's life inspired her character's story in the Rose/Bernard centric episode, "S.O.S.".