Complex sentence: Gabriel's monopoly on the album's writing led to tensions among the band's other members, and these were exacerbated when Gabriel would regularly leave sessions to be with his wife who had a difficult labour when giving birth to his first daughter.
Split into simpler sentences: Gabriel's monopoly on the album's writing led to tensions among the band's other members. These were exacerbated when Gabriel would regularly leave sessions to be with his wife who had a difficult labour when giving birth to his first daughter.