It's interesting because they can really only stop her from selling in Lincoln. She can sell outside the town. Likewise, CT can prevent me from selling in-state if I do not make things in an approved kitchen under the supervision of someone who is servsafe certified. But they cannot prevent me from selling across the border or stop people in home bakeries in other states from selling here.
I'm about 20 minutes from MA and I am exploring how much of my business would have to be in MA. I can setup the transactions there as well as setting up a post office box for mail and incorporate there too.
It's mostly an intellectual exercise at this point.