It sounds like infertile eggs (slugs) to me too. An animal does not have to be fertilized in order to lay eggs, chickens do it every day. Who knows what the trigger was to cause her lay eggs after 14 years? It could be differences in her diet, or a cooler winter or an earlier spring or more humid conditions, it could be a lot of different things. If they are eggs, one thing you want to make sure of is that she's now empty and has all the eggs out of her otherwise it could cause problems. If you post a pic, we could tell you what they are.

Mark