I was thinking... what if Nuka wasn't Zira's son, but yes, from Scar and Sarabi? Maybe Scar wanted Sarabi to be his queen and give him a heir, but since both were too old to mate, Sarabi gave birth to Nuka, a weak cub. Scar gave Nuka to Zira even with Sarabi's protests and made Zira his queen. Many months later, Vitani and Kovu were born...
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Lineart (C) Savu0211 and LinesBasesTemplates