Hello again and thanks for waiting.
I have worked out an answer for you below ...
1. I know you are concerned about Coco, but the good news is she should be just fine. You see aspirin is sometimes prescribed for dogs and is regarded as safe in the species. A usual dose rate is 5 mg per pound of the dog's bodyweight given orally twice a day, so a top dose for a 16 pound dog like Coco works out at 80 mg which to all intents and purposes is the dose she took.
2. There is nothing special you need do in this sort of situation, she should be just fine, but the milk was a good idea to settle her stomach just in case.
3. Here is a link to an accurate article on aspirin and how it is used in the dog including dose rates, LINK
I hope I have covered your question fully enough but if you would like further clarification or to talk things over a bit more then I will be on-line for the next hour or so and I will be more than pleased to continue working with you.
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