This looks like fairly standard file corruption. Just save them again from your master files, and send them to her again. I'd be surprised if it happened twice.
So if you wanted to do a black-and-white of this one, use Channel Mixer for your conversion. Add the Channel Mixer layer, check the "Monochrome" box, then enter 0%, +100%, 0%, 0% for the four sliders.
Download the PSD file
I began by duplicating the Background layer and doing the Liquifying on it. Then I added the mask and masked it on.
Then I realised I needed some new shadowing, so I created the Hue/Sat layer below the Liquify layer for that purpose.
Finally, I realised that some grass was crooked, so I added the Clone layer for that purpose.
If some or all of that doesn't make sense, add The Layers & Masks Class to your list.
Ok, then this is going to be challenging for you.
You'll find plenty of YouTube videos to teach you; I've recorded one here.
Give me a minute and I'll upload the PSD file of my edit, I hope you'll be able to make some sense of it.
Ok, I've got a fix to show you for your consideration. Let me know when you've fixed the colour space problem, and we'll go ahead and start discussing her skirt.
Oh gee, I beg you, PLEASE don't wait a moment longer to take the Raw Class.
However, your job right away is to fix the catastrophic colour space problem. Follow this troubleshooter all the way to its conclusion.
While you're doing that, I'm going to have a play with your photo and see what's possible for the fix.
Oh gosh, the pattern is going to make it difficult, that's for sure.
Go ahead and do your raw processing as normal, then post again for me, including a closer crop of the area (I always feel seedy asking that!)
It's a fairly simple matter of layers and masks. Honestly, the editing side of things isn't challenging - it's the conception and photography you need to get right. Angles and lighting and so on. You need to give them a fair bit of thought.
Edited: What Christina said.