Muscovy drake broody?!

[rubber duk]

An update..................................now have 2 sitting on the same nest, the 1st one built it 3 weeks ago & sits quietly & still as normal. It's full of eggs she laid
1 week ago the 2nd duck started sitting after making the same nest twice the size but I never saw her lay any eggs in the nest. She is now with the 1st but moves & fidgets all the time, maybe disturbing the other?
My question...............................will the 2nd duck upset the 1st so stop eggs hatching?
The Drake just sits & watches! Should I separate the 2nd one with the Drake, any ideas or experiences please, as before my other duks have always made separate nests?

 

[Miss Lydia]

An update..................................now have 2 sitting on the same nest, the 1st one built it 3 weeks ago & sits quietly & still as normal. It's full of eggs she laid
1 week ago the 2nd duck started sitting after making the same nest twice the size but I never saw her lay any eggs in the nest. She is now with the 1st but moves & fidgets all the time, maybe disturbing the other?
My question...............................will the 2nd duck upset the 1st so stop eggs hatching?
The Drake just sits & watches! Should I separate the 2nd one with the Drake, any ideas or experiences please, as before my other duks have always made separate nests?

I think just for precaution I'd move 2nd duck and drake to their own quaters till mama hatches ducklings and they are at least 2-4 weeks old.
Then have supervised time with all together and see how 2nd duck and drake are around ducklings.

 

[rubber duk]

Thanks for your help