Complex sentence: De Gramont accepted Barney's nonmonogamy--perhaps reluctantly at first--and went out of her way to be gracious to Barney's other lovers, always including Romaine Brooks, another of Barney's lovers, when she invited Barney to vacation in the country.
Split into simpler sentences: De Gramont accepted Barney's nonmonogamy--perhaps reluctantly at first--and went out of her way to be gracious to Barney's other lovers. For example, she always included Romaine Brooks, another of Barney's lovers, when she invited Barney to vacation in the country.