Hi Heather, I would do it with the Patch Tool, similar to eye bags. A little bit of cloning would be necessary too, near the hem of the pants.
First, take them out altogether on a new layer:
Then lower the opacity of that layer to a point that you think she'll like (this is 69%):
And of course the beauty of it is, if she comes back and says she'd like them more or less visible, just return to your PSD file and tweak the layer opacity further.