Tina Knowles says she put Beyoncé and Solange in therapy together as kids so they would learn to get along

Tina Knowles sent her daughters, Beyoncé and Solange, to therapy as kids.

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• Tina Knowles says she sent Beyoncé and Solange to therapy as kids to foster a strong bond between the sisters.
• Knowles said her family — and even her ex-husband — was upset with her decision.
• Experts say it's normal for most siblings to argue, but there are ways for parents to help their kids get along.