Breeding block? i'm not familiar with that term after breeding for 20 years, lol...ought oh..
If you have them together and there is any type of nest box/small, dark box or place that they can get to, or any type of nesting material/bedding available to them, even in the bottom of the cage, then they will mate if they are a male and a female and they are already bonded, especially if they've already bred.
In order to stop them, which you should because they just had a clutch, and that's not a good practice for anyone, not even seasoned breeders, to practice, the hen needs a rest and a very nutritious, varied diet that includes lots of calcium supplementation, fortified pellets and seed mix, and lots and lots and lots of fresh veggies ASAP. So if I were you I would take every precaution to stop them from mating again right now.
Remove all nest boxes, all bedding/nesting material, the "breeding block", whatever that means, lol, and then you need to put them on a "Natural Light Schedule" immediately, starting today. You can search that term here in the forum to get the specifics, but basically you need to keep their cage in a spot where they can see the sunrise and the sunset through the window every day, and they need to be uncovered at sunrise and covered at sunset. This will calm their hormones.
As far as the eggs go, if she has already again started laying them, then you need to get the plastic eggs and replace them immediately!!! She can't be laying continuously like that, not back to back, it's going to end badly for her. If she laying in a nest box then wait until she leaves it to get a drink, pull the real eggs and replace them with the fake eggs, and then put the eggs in the freezer overnight immediately, then pitch them. If she is laying them in the bottom of the cage, just keep the plastic eggs inside of your hand, reach in with that hand, grab a real egg and then drop the fake one. She won't realize they aren't the real ones if you do it that way. So from that point on, every real egg she lays needs to be replaced with a fake egg immediately and then the real egg frozen immediately and thrown out in 24 hours. She'll most likely lay a small sized clutch at this point, but if you get them on the Natural Light Schedule and remove the nest box/bedding material right now and just put the fake eggs on the bottom of the cage with no nesting material available, this will be her only choice as to where to lay them, which is totally not ideal. This will do 2 things: It will discourage her from wanting to lay egg/mate because there is no safe place to do so, and once she lays on the fake eggs for 3 weeks and none hatch she will get bored and abandon them. Once she stops sitting on the fake eggs then you can remove them.
All of these actions should stop the mating/egg laying pretty quickly. But please be sure that you are giving that hen a ton of fresh veggies, and if you only feed a seed mix you need to start transitioning to a high-quality, fortified pellet immediately, as she's going to start suffering from malnutrition otherwise, YOU CANNOT BREED HENS AND ALLOW THEM TO LAY EGG CLUTCHES WHILE ONLY FEEDING THEM A BAGGED SEED MIX. I don't know if that's what you feed them, but I believe you said you don't feed veggies, so I'm just making sure. Make sure you have both a mineral block and a cuttlebone available at all times to her. You can even get an avian calcium supplement to sprinkle on her food, better yet a powdered Avian multivitamin, such as the Quiko brand powdered Avian Multivitamin that you can buy at any Petco store (they also sell the Quiko Avian Probiotic powder too at any Petco, both are surprisingly highly recommended by CAV's for parrots that are not on the best diets, are transitioning to a good diet, or for breeding/laying hens)...
