Did You See The Weird Shadow In The Twin Falls Sky Thursday?

I have something weird for you. For me, that's actually normal. But, follow me on this one. Thursday afternoon, my wife saw a really strange shadow that went across the entire sky. It ran adjacent to a jet trail. But, the strange part is the shadow extended far beyond where the jet was in the sky.

I've cropped out the houses to focus on where the jet is. You can see the shadow goes well beyond that.

With the position of the sun at that time, I realize that there should be a shadow there. However, it should be restricted to where the plane's already been, correct? There were no other jets near that area at the time or prior that I'm aware of.

I would love it if some rational person could explain what she saw. Rational person, where are you? Please help.