If you don't like her stuff or think it's too expensive, don't buy it. Simple. Not sure what the point of creating a forum post about it, what exactly are you hoping to achieve?
I take it you're not running your own one person business? If there is a perceived large mark up on an item have you broken down all the other associated costs to see just how much the mark up really is and how this companies to other companies. So let's take one of the necklaces.
* Materials purchased and cost of postage or transport to collect them
* Associated labour assembling the item (this is the salary of the person making the item)
* Costs towards postage if selling online
* Costs towards physical shop if not selling online (I've just had a look and can see Kelly does both)
* VAT
* Money towards rolling business costs, not all the money 'made' will be felt as pure profit
* There are likely to be other costs if the person is running an actual business and not an Etsy hobby or side hustle
If a necklace is costing her say a tenner to make (chain plus charm) in terms of raw costs and she's charging £90 for it, the remaining £80 is nowhere near pure profit, it's paying for all of the above BEFORE profit is made. Yes, there is a mark up- what would you suggest in terms of how much she should charge to cover the costs of above and make a living for her and her child? How many would she need to sell at your suggested cost to be able to survive?
As consumers it's up to us to make decisions about whether we are happy to pay for something at the price it's selling for. Having worked in retail I can tell you that the markup on Kelly's items are no more than any other commercially available pieces of jewellery that you may find out there. In fact many pieces on the high street including clothes that you're probably wearing are marked up to more considerable proportions, often only costing a few pence to make and selling for lots and lots more. As I said, consumers make their own decisions- if you're seeking to raise awareness that there is a markup on her items then I feel it's slightly misplaced given her markups and no different to anything else out there and she's a one person business. She's not a conglomerate with factories of poorly paid staff assembling items for extremely poor pay and poor conditions, this is how companies that seems 'cheap' keep their costs down.
As I said if you're not into her stuff and think the mark up is too much, don't buy it simple as that. Or you could offer her some business advice regarding costings if you're qualified to do so. I believe her contact information is available on her website.
I find it quite sad and disturbing how you go after one of the most genuine and sweet persons, on line.
Why don't you continue ordering cheap stuff, that is not extortion (not your extortion, at least, but I can assure you there are many forms of extortion in the supply chain) and just let it be?