Looking at this photographers’ other images, it is clear that she is initially positioning her subjects where she is able to take full advantage of the composition with the help of wide apertures and shallow depth of field on her 85mm f/1.8 lens with a full frame sensor to create the effect.

She also very clearly ensures that she only clicks in soft light; both Windows and outdoors or if she has setup a softbox, the same applies.

From the outset, she seems to be clearly setting up her vision and the composition for the soft mood of each image, in-camera before moving onto post processing.

In post, all I see is an appropriate level of blemish removal, skin smoothing and Dodge & Burning to make the image pop.

You will need to read up on the various methods of skin smoothing, but the effect can be initiated with a simple clone stamp tool, to frequency separation where you work on Texture and skin tone/Colour separately - https://photo.stackexchange.com/search?q=frequency+separation all the way to a high end Dodge and Burn https://photo.stackexchange.com/search?q=dodge+and+burn.

But for any of this post processing to work affectively, there will be a need for a solidly composed RAW Image which can be developed and enhanced and not just any ordinary image to be totally reconstructed.