That's a really weird thing to say, considering that all of nothing is happening between the two of them. It looks like Rainbow just did a trick, with Applejack watching, and is eager to see what she thought of it. If one sees shipping in this, I would suggest taking a breath, closing the image, and mentally evaluating why such a conclusion was jumped to.
Very nice picture, the softness of the sunset is really beautiful. One thing: the softness of the ground is too intense. It doesn't really feel natural, and it doesn't contrast well against the skyline. That's the only problem though.