[Biatch]

I think they have "some" brighteness - in the sense that they know how to keep Heff sweet enough to reach their goals.
Kendra might have gone over the top when she went on tape saying she has a 3 year plan - or something similar- with Hef, then she goes on her own.
maybe Hef realised what she said will look like she is using him and didn't like that for his ego (even if, deep inside, he MUST know it's true).