Can cats sense if someone has bad vibes? Please read?

I need a second opinion on this... I clean houses with my coworker and sometimes the clients have pets. Well, with this one house that we go to every month, there is a cat that ALWAYS hisses at my coworker every single time it sees her but the cat never ever hisses at me. She even rolled on her belly and let me pet her when I was in a seprate room. However, ANYtime she she's my coworker, she hisses and even runs away. And you know what's even weirder? My coworker and I were in the same room downstairs and when we both walked out together to go upstairs the cat was on the stairs and looked at my coworker and hissed but then looked at me and meowed. The cat didn't know which emotion to use. It wanted to hiss at my coworker but softly meow at me. It was the weirdest thing. Now, I'm wondering if my coworker has bad vibes or if I should take that as a sign...
Can cats sense if someone has bad vibes? Please read?
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