Natural Photo Retouching for a Meaningful Family Memory

I need an experienced photo editor to retouch a lady's arm in a cherished family photo. The goal is to naturally smooth the appearance of her arm while ensuring subtle and natural enhancements that don't look overly edited. This photo is meaningful to the family as her husband in the picture recently passed away, and I want it to be something she feels good about.

Requirements:
- Improve the appearance of saggy areas in the arm while maintaining realism.
- Ensure overall natural quality and continuity with the rest of the image.
- Necessary expertise in photo editing software (e.g., Photoshop) and attention to detail for realistic edits.