That's definitely catshopped (as distinct from photoshopped). I can tell when a cat has that "OK, I'll stay here, but it'd better be worth it" expression on its face ... :-)
On reflection, the expression seems more of a "chill out - I probably won't bother smothering him" expression.
OMG - your cat is considering murder!
As a footnote, I definitely catch my two dogs occasionally sharing that "together, we could take her down" look.