Nature vs. Nurture
The obvious chemistry between these two star-crossed mammals was fated to end sooner or later. They're simply from two different worlds. A well-mannered house cat, pampered since birth and a capricious monkey, forever beholden to the call of the wild. It's tragic, really. And unbelievably adorable.
Though their brief interlude could never last, it did put an end to the ages-old conflict between House Monkegue and House Catulet. Go hence, to have more talk of these rad things.