If you can find a way to let her have time off her nest without one of the other ducks getting in her way, boy they can be so temperamental when broody My Muscovy chased everyone around the property, and will still if anyone gets too close to her ducklings. She needs to eat and drink and have time to bathe and poop. It will be up to you if you let her keep her eggs, how many days now 5-7? the eggs are showing signs of life now. Have you candled?
When we take away eggs and destroy their nest they don't immediately break from being broody those hormones take a while to dissipate. Honestly, I have never been able to break one of my Muscovy I usually just let it run its course but I make sure they are out at least 2X a day to eat drink bathe, and poop.