Robert was married twice. Through his first wife, Aelis, a descendant of Charlemagne, he had two daughters. Each married powerful lay vassals of their father: Emma of France (894–935) to Rudolph, Duke of Burgundy, and Hildebranda (895–931) to Herbert II of Vermandois.

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According to the Wikipedia entry on Beatrice de Vermandois, Robert I's second wife:

http://en.wikipedia.org/wiki/B%C3%A9atrice_of_Vermandois

Beatrice married Robert in 895 (roughly age 15) after Aelis/Adele du Maine died. Given that Adele de France was born also around 895, it is likely that the childbirth caused Robert's first wife's death. However, there are no records indicating much of anything about Aelis/Adele du Maine's life. Therefore, she was never Queen of France, merely the Duchess of France (wife of the Dux Francorum).