trying to hatch call ducks

[basketball duck]

I have a call duck girl who is laying eggs but I'm not sure is she is going to sit. If I had a chicken who was broody I would just stick the eggs under it because that's worked really well in the past. It allowed me to keep a close eye on the eggs and help them if they needed it. I,myself thinking of getting an incubator this year would like to hear your thoughts????