"Wife" or Sex-Slave

When Ceasar Achellam was captured last week in an ambush crossing the river, he was taken with his "wife," a small child, and a helper. Some have made a big deal about needing to reunite this "family," but the government of Uganda had good reason to reconsider. The "wife" was under age according to Ugandan law and was likely to have been given to Ceasar as a sex-slave when she was younger as she had conceived the child with him some time before. As such, would it be just to force her to go back to the man that had abused her? Plus, she was not a Ugandan citizen so the Ugandan government couldn't force her to go back to Ceasar.