How did Penelope trick the suitors and give herself more time before she had to make a decision regrding whom to marry?

As the previous answer was completely incorrect; I will delete it.

The most prominent would be when for three years, she stalled the suitors by claiming to need to weave a shroud for Laertes, Odysseus' father. By day, she would work at the loom, and by night, she would sneak in and undo all the work. It would have been a much lengthier scheme if a backstabbing maid did not expose her to the suitors and force her to finish the shroud.