Hi,

sounds like normal 13mnth old behaviour. It's all part of breastfeeding an older toddler. As Jennifer says, she can learn some manners at the breast. "Twiddling" is a boredom buster and can help the milk let down faster. But if you don't like it a gentle "No" is OK and put your hand over hers to stop her. As Ginger says, beads can be helpful in distracting.