A 17-year-old dating a 25-year-old? Khloe Kardashian says Kylie Jenner and Tyga are a 'special case.'

One of the most fraught issues in the Kardashian universe over the past year is the alleged relationship between "Keeping Up With the Kardashians" star Kylie Jenner, 17, and rapper Tyga, 25.The issue blew up earlier this year when model/rapper Amber Rose publicly criticized Tyga for leaving his ex and young son "for a 16-year-old who just turned 17." (Kylie turns 18 in August.) Through the storm of controversy that followed, Tyga denied that he was dating Kylie. But the denial became questionabl...