My sistter's plant?!?!?

Question

My sister has had two peace lilies for about a year now. However, she never waters them but they receive plenty of light, yet they are still surviving! How are they surviving without any water? Their leaves are still nice and green and they have flowers!

Answer 1

If they're outside they're getting rain water.

If they're inside eiter your sister is watering them and not telling you about it, or someone else is watering it.