OMGosshhhh! They are so cute!!!
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too cute! 
X2I would leave her sitting if you think some eggs might hatch yet, as long as she's allowing the ducklings under her for warm I wouldn't worry about it.
If all eggs were set at the same time, you may want to remove them though because unhatched eggs can explode and release nasty bacteria. So it depends on what's in the nest.
You never forget that smell. Handle those stink bombs very carefully.