family: .... ride, sister ride, upon your...

... mystery.... horse?

Probably enacting some important scene
(from some important episode of S.C.)

There are few things that make me smile as much as watching K&L playing together. They most often do it well, with an occasional hiccup. And when they're doing well, they do so well:

But most importantly, enjoying each other's company
(momentarily)

This is the kind of Saddle Club I can really get behind!