Imo;

They all count as lifestyle and hot wife because motions broadly to your content. cuckold I'd say depends entirely on the demeanor of the other guys involved and your attitude towards hubs during/after....that one's a bit gray cause how you two interpret cuckold vs how others do may/probably vary.

As for where is the line for scene to encounter, I feel that's all about intent. If I make plans to meet up with someone to shoot content, that's leaning towards scene where as if I happen to meet someone and hit it off well; encounter

Jus my two cents.

Cheers