How many children did Toussaint Charbonneau have?

When Toussaint settled among the Mandan and Hidatsa tribes near present-day Bismarck, North Dakota, he purchased two captive Shoshone women: Sacagawea and "Otter Woman", from the Hidatsa.After the expedition and after Sacagawea's death, evidence suggests he gained another wife, much younger than himself while living at Fort Mandan. He had no children by her, and they were not married long before he died.