Does your Pekin sit?

Petunia laid two eggs two weeks ago and then stopped. She never set them and I ended up throwing them out. Over the past five days she has laid three eggs. She laid them three days in a row and now for the past two days she hasn't laid any. She does not seem to be planning on sitting these. I thought ducks laid bigger clutches anyway. Should I take these eggs and try to put them under a broody, or do you think she will go back to laying and eventually sit?