Add Son to Family Portrait

I have a treasured family portrait that’s missing one important face—my son. I’ll supply the high-resolution family shot along with the exact photo of him I want included. Your task is to blend him into the scene so naturally that no one can tell the image was ever edited... (Budget: £20 - £250 GBP, Jobs: Adobe Photoshop, Graphic Design, Image Consultation, Image Processing, Photo Editing, Photo Retouching, Photoshop, Photoshop Design)