Lady Gwendoline called Jennie Jerome her mother-in-law and Winston Churchill her brother-in-law. Her article in thepeerage is here.
From The Athenaeum; small spots throughout image removed with Photoshop by gogm.
Form follows function when the function is critical - such as cold weather protection. Lady Gwendoine wears a completely enclosing fur coat, a hat for cover, and leather gloves.
Keywords: 1915, Lavery, Gwendoline Bertie, Bertie family, Churchill family, British, hat, high eclosing neckline, coat, fur, long full sleeves, long close sleeves, gloves