Subtle Waist Slimming Retouch

I have a single high-resolution photo that needs a light, natural-looking retouch: just slim my waist while leaving everything else—skin tone, background, colours, facial features—exactly as they are. The edit has to be invisible to an untrained eye, so please avoid obvious warp marks or stretched pixels around nearby objects. Source file: 24-MP JPEG. Deliverables: the retouched JPEG in full resolution plus an editable layered PSD (or equivalent Photoshop file) so I can toggle the change on and off for comparison. A same-day turnaround would be ideal; the job is small and should take an experienced Photoshop editor only a few minutes. Let me know if you need any additional info before starting.

Project ID: 40216589