Complex sentence: Her husband was not keen on the socialising but their houses attracted Evelyn Waugh, Cyril Connolly and Peter Quennell, and she had affairs with Hugh Gaitskell and Roy Jenkins.
Split into simpler sentences: Her husband was not keen on the socialising but their houses attracted Evelyn Waugh, Cyril Connolly and Peter Quennell. She later had affairs with Hugh Gaitskell and Roy Jenkins.