Complex sentence: She tells John that they divorced because of infidelity; the reason she had not done that earlier was the great sex with Mr. Woodcock, once he made her black out from pleasure, and made her speak Portuguese, despite having no knowledge of the language.
Split into simpler sentences: She tells John that they divorced because of infidelity; the reason she had not done that earlier was the great sex with Mr. Woodcock. Once he made her black out from pleasure and be able to speak Portuguese, despite having no knowledge of the language.