Did you all see this interview of KC? the lady asks him if TBG kiss at the airport was real because it was so passionate and it felt like they had something going on in real life....Kevin has his hand over his forehead the whole time during this section and agrees to the kiss being passionate but DOESN,T DENY the allegations the lady made of something going on between them. He manages to dodge the question with all sorts of long explanations..lol...
Also look at how teary and red his eyes get when he talks at the beginning of knowing people wanted to hear from him after Whitney died.
Kevin Costner Talks Delivering Whitney Houston's Eulogy