Cheetah is quite tame usually. Even on Animal Planet they always portrait cheetah as human friendly. Some ancient Egyptian wall paintings have cheetah hunt along side of humans. As far as I know, there had been only two incident with cheetah. The last one was simply a miss bite. This time it sounds dangerous. Cheetah is all for speed, and they aren't built for fight, but they still can take down larger animals than themselves, it should tell us something.
I bet the husband sold the photos for some good money and was telling his wife "It's worth it". Shame on him.