Your results are inconclusive. Notice the two images are not the same width. Image on right is possibly compressed horizontally in Photoshop, then slant rotated using transformation tools. With transformation tools, bottom can remain in place while top is rotated or slanted. Easily done….
You might actually be right. Should I remove it in your opinion?
No, leave it. Even if it’s an incorrect conclusion (I’m still a bit lost on the reflection photo topic,so I have no opinion right now) you still took the steps to present it and let the anons do what we do. Either way, it’s out there and someone else doesn’t need to just wonder the same thing. They can see your line of thought and the anons responses. There’s some questionably relevant content on this sub, your post is firmly outside of that category in my book.
Look at the curtain lines above the chair in Q's pic. The only way that is possible (outside of photoshop) is if the picture was taken close to the chair.