Extend & Center Professional Couple Photos

I have two high-resolution portraits of a couple standing beneath a domed arch. I need the canvas widened so the background continues seamlessly in the exact same style as the original scene, then have each image squared up (no tilt) and the couple positioned precisely in the middle of the arch.

Please keep the existing colors untouched—no filters, grading, or extra retouching—just the extension, straightening, and centering. Please make sure the photos have the same, if not better, clarity and focus. Fix any blurriness of the image as you see fit.

Final files: two print-ready JPEGs plus layered PSDs so I can make minor tweaks later if needed.