I'm quite sure what you started with was nothing like what you ended up with! I mean this as a compliment. I feel a photograph only starts in the camera, to be manipulated in the computer darkroom until you're happy with the final result. Obviously the composition of this image works wonderfully, but I believe the end result you obtained is much more artistic than the original picture may have been. The sepia tone works very well for this picture, and I love the final result!
This looks like Indian Summer. I like the shade from the apple(?) tree and the light shining through the wicker chair. The sepia makes a nice warm relaxed feeling.