How sensitive are Muscovy ducks when they're nesting?

I don't change my routine when my girls are nesting...but I also don't fiddle with them or their nest. Our one girl last month went broody for the first time and she abandoned her eggs for some reason about 4 days before they were due to hatch. A month later....she is broody again with 12 fertile eggs. 

Is she sitting on her nest? If the nest is outside, I would kind of suggest moving her eggs into the shed, or wherever you keep the ducks at night (I am just assuming you lock them in at night?) and try to encourage her to lay inside.

I didn't even see you were in Hawaii! LOL Just keep an eye on the eggs. Once they go broody they are usually pretty stuck to their nest no matter what

In my experienece with muscovy it somewhat depends on the hen....One of mine sits and stays sitting from the first day she decides to even if she is laying more eggs in there still.....The rest of them   will lay a small clutch, start sitting at night while still laying.....then the sitting gets progressively more where I will see them out only 3 hours a day then 2   but even up until a week or so before hatch they will come out for up to an hour a day  and 3 of them have hatched over 30 ducklings in the past 2 weeks.    

I dont change routine.....as long as you dont think the eggs are too old you can take some or all of them.....They are very determined girls and may look for a new nest spot if you take them all but simultaneously I feel like leaving a few to show the girls where to lay encourages sitting (could just be my opinion on that issue) so its balancing act to not end up with literally 100's of babies a year from a few hens.

oh and no predators at all in hawaii??

I'm still a duck-newbie, but to share from our experience so far, our nesting Muscovies weren't sensitive at all.

We had two girls laying on nests at the same time recently: BabyDuck and Echo. BabyDuck was friendly to me prior to nesting (and a bit of a brat once broody), but she stayed with her nest the entire time. Echo was newly adopted, not used to people really. She also stayed with her nest, right up until 5 days before Hatch Day. She was chased off her nest, and try as she did to get back to it, BabyDuck felt it was too close to her own ducklings and wouldn't let Echo back.

But the cool part of Echo's nesting was that while she was on her nest, I would be able to reach in and stroke her feathers. I also took eggs out from under her for a while (a third hen was laying eggs in Echo's nest).

So, for a bird who would run from humans, letting one pet her daily and lift her up to take eggs from beneath -- that, to me, doesn't seem very sensitive. That seems pretty steadfast.