I would send in a friend to check her out, get her talking on how "she made it all" and how they are all her designs, get your friend to buy something, then go back to her stall with your friend and confront her and take all your stuff off her stall. Another way is, as you have taken photos of all the items that you gave her, just go to her and announce that you are doing a stocktake or audit of your items for tax purposes, and a quality check to make sure that they are all still suitable for sale "after all that handling" just so that you can give her the best possible quality and the fact that you are about to release some new designs. And that you will return them as you go through them. This might be less confrontational for you. Then after a couple of days if you haven't already done so, terminate the agreement. Just be a bit creative with your blurb. Luckily not everyone is a rip off merchant and if you enter into something like this again can you "tag" your items somehow? Have your intials or business name engraved onto the back, and produce a swing tag attached to the item with your information, and some advertising blurb on it. People love home crafted and "made in Australia" items, and maybe you have some other unique point of difference that you can promote. You probably work way way too hard to have someone else either taking the credit,  copying, and not paying you. I always admire people who can make things themselves, best wishes and good luck, and don't give up, there are good people out there too.