Up until yesterday, I am not sure Holly knew there was a second cat. While Emile has made sure everyone knows his issues, Leela has been generally silent.
Suddenly yesterday Leela announced she was coming down. I had about two seconds to close the gate before she came through.
Like the rest of us I am pretty sure Holly was mystified by the Leela/Nim love affair and grooming session. Perhaps Holly was jealous?
Leela is interesting. She really doesn't do much eye contact with Holly, but apparently as of yesterday was done hiding.