You pre-empt this kind of insanity with a contract. No changes after a specified time, payment time defined as being cleared through your bank, and delivery all spelled out in excruciating detail.
If I am responsible for delivering a cake, then it is NOT finished until I have set it onto a properly level table and made final adjustments. Because I am NOT going to travel with tiers all stacked up...
And NO I would not send out pictures of unfinished cakes. I can't think why any customer has any reason to ask for a bakeshop picture, when the contract is for a cake delivered onsite.
If you want, send her a picture of packages of flour, sugar, butter and eggs...








