We have a large window and a dog who likes to look outside too. We use something like the curtains in post #1. The grommets make them easy to move, and they’re lined so they keep out the light. They have 84" and 63" lengths, so you could use whichever you prefer. I think it takes me 2 sets to cover our window, but it’s larger than yours (~102" x ~60"). Sometimes I use a slightly darker shade for the outer panels than I use for the inner ones to provide contrast. If you’re not going to open the outer set, you can try 84" panels there and 63" in the center. The longer ones may be harder for the dog to damage if they’re tucked behind the couch.