It's good that you have them on a Natural-Light Schedule, that's exactly what you want to do...As SilverSage already mentioned, a lot of people mistakenly actually lengthen their daylight each day, thinking that that's what will ease their hormones, when it actually only makes them worse and worse...Natural Sunlight is good for them, though they won't absorb any UVB light at all through a window because all clear plastic and glass blocks 100% of the UVB light from the sunlight coming through the windows (bummer), but it's necessary for them to actually see the sunrise/sunset each day as a part of keeping them on a Natural-Light Schedule...
As already mentioned, Cuttlebones and Mineral Blocks made for birds are great sources of extra Calcium and Phosphorous, along with lots of dark, leafy Greens...But NO Vitamins at all, not the drops or the powders, as they actually do more harm than good. You're much better off with just the Cuttlebone, and Mineral Block, and lots of dark, leafy Greens each day.
****Usually they don't start actually sitting on the eggs until they lay at least 2, sometimes even 3. Then they'll start laying on them typically. So for now just let the egg in the food bowl where it was laid, because she wouldn't be laying on it even if it was on the grate, they just don't typically lay on the first egg laid...However, after she lays the second egg, which should be today or tomorrow (might be later, so don't worry if it doesn't show-up today or tomorrow, but it likely will), it will probably be laid on the bottom grate and not in the food dish, just due to space constraints in the food dish...So after she lays the second egg, you might want to think about moving the first egg down with the second egg, because you actually really do want her to lay on them, the idea being that you allow her to lay on the clutch for as long as she wants and until she realizes that they are not going hatch, gets bored with them, and completely stops laying on them. Once she goes a day or two without laying on them at all, then you can throw them out..
I've been in the situation before where one egg was laid in a food dish and the rest on the bottom of the cage, and I decided to leave the egg in the food dish, allow her to lay on the rest of them that were together on the floor of the cage..But she was preoccupied with getting that first egg out of the food dish once she had laid another egg or two, I'm assuming because she wanted them all together so she could lay on them. I think this distracted her and actually just pissed her off, lol, and she ended-up laying 12 infertile eggs in total!!! So after that happened I started moving any eggs laid in the food dish down to the bottom of the cage with the rest of the infertile clutch, but only after she laid another egg or two on the bottom and started laying on them. Once she started laying on them then I moved the egg down and put it with the rest of the clutch, and everything went as planned...
Sounds like you're doing everything right to discourage hormones and egg-laying, and hopefully she'll lay this clutch and then she'll be knocked out of breeding-season...
so sunlight=good, extra hours of daylight=bad
