Pregnany invention: Anti-Fork to mouth device!? what do you tink?

So i am an engineer and i thought to myself "How can i prevent pregnant women from getting fat and stretchmarks?". Well i could invent some sort of device that sends a shock to you if you put the fork to your mouth more than 15 times per day. Everyone knows that the reason these women get so big is because they cant put down the fork. What do you think? Sound like a good idea?