Lion King 2: Scrapped Off Incest!
Kovu was supposedly the son of Scar. However one thing must be verified, Kovu is NOT the biological son of Scar, meaning that there is no actual blood incest between Kovu and Kiara. Now one may argue that if Kovu were the adoptive son of Scar, he would be legally the first cousin once removed (or better called as the second-degree uncle since he would be one generation higher). They were however not genetically related thus eliminating any blood incest between them.