She may or may not try to hatch them. Do you have a male? Statistically pekins aren't broody but mine tried 3 times last year to hatch and I know a few other people with broody pekins so it's a possibility. If you don't want ducklings just take the eggs. If you'd like to eat them you can take them too. She'll likely lay any new eggs in the same spot - just because she's laying them together doesn't mean she plans to hatch, a lot of ducks make a nest and lay all their eggs there