From Wikimedia; spots removed throughout image with Photoshop and image enlarged by one quarter and sepia tone removed by gogm. Wikimedia lists the photographer as Alfred Grohs, but the next image suggests the photographer is W. Gebhard.
Ina is dressed casually with a light weight jacket in this photo with Prinz Oskar who is dressed in, what else, a uniform. The next image shows this charming dress in more detail.
Keywords: 1914, Grohs - Alfred, Ina von Rupin, Ina Marie von Bassewitz, Countess von Rupin, Gräfin von Rupin, Prinzessin Oskar von Preußen, von Bassewitz family, Hohenzollern family, Countess, Princess, German, straight coiffure, lace chemise, high enclosing neckline, necklace, blouson blouse, square neckline, elbow length sleeves, bracelets, waist band, floral bodice ornament, natural waistline, tight skirt