Assuming you are asking about a generative AI way, you could use photos of your new wife to train a LoRA with kohya-ss, then with A1111 you could do an img2img repaint using the ControlNet extension to make sure you get a similar pose. With enough experimentation you could probably get at least one decent result.

At least that's what comes to mind with the things I know you can run offline.

I know someone who did something similar. He remarried then went back to and cropped or deleted ten years of Facebook photos to make it look like he never had a previous relationship and just ten years of boys nights.

He even has a picture up of him from his wedding day… standing alone in a tux.

Give it five years for the tech. Right now? Probably easier to get back with the ex to make the portrait correction.

/jk sorry

Ask everyone to pose for a new photo

The kind of stuff the op is doing—-changing the composition to reflect a picture that could have been taken—-is one thing. But what you are asking feels Stalin-esque to me. A picture is a record of a point in time and you can’t change the past.

Scissors and a Pritt stick.