Mg tends to turn upward, not downward (praying for magnesium?). I'd be looking at VPD numbers on this. Also, necrotic leaf edges on older leaves are an indicator for Ca uptake problems, IME. Interveinal chlorosis of older leaves, sometimes along with upturned leaf margins, is the tell for Mg deficiency.
To me they appear to be either too hot and/or overfed. I'd also be curious to see how the media would test out (EC + pH numbers). I perform such a diagnostic test in the following manner:
You'll need clean, filtered (or distilled) water of known parameters, you'll absolutely want to know EC and pH before you begin the test.
Then take a small portion of the growing media (you may want to pull the plant out of the pot and get a sample from all layers of media, not just the top) and add enough water to allow it to be swished around, in other words you want it very, very wet.
Let set for 5-10mins.
Strain off and test.
What's your growing media? What's the pH of the feed going in, along with EC (if you use ppm please give conversion factor used)? I never use run-off pH as an indicator, I personally have yet to alleviate an issue doing things that way, only the method I outlined above.
Now, depending on where those numbers land you may or may not have found the problem. If your wife was overfeeding then you know that your girls are going to need a bit of a flush, or at the very least get water only until they straighten out. If the numbers are where you like and want them, then you will need to take another approach.
