Complex sentence: Carolyn married Street in November 1969 and he dissuaded her from continuing with the Velvelettes-preferring that his wife care for the home-so Gill decided to break up the group and it disbanded.
Split into simpler sentences: Carolyn married Street in November 1969 and he dissuaded her from continuing with the Velvelettes, preferring that his wife care for the home. So Gill decided to break up the group and it disbanded.