Licking and Licking and Licking

In the past couple of days Annie has begun this licking of the bedspread or any type of material she can find such as a throw on our love seat.

Does anyone have any idea what this could be related to or what is causing her to do this? We keep telling her to stop and after about the fifth time she will and then move on. She has never done this before and we are curious if you guys have any suggestions or have experienced the same time of behavior?

Thanks!

Kathy