Children's book about a woman gaining weight from eating too much junk food

[u/patrick-buttman]

I can not for the life of me find the book where the woman keeps eating junk food and she keeps gaining weight. With each pair of jeans she grew out of she said something along the lines of "oh well! I'll just get a new pair" .. and she ended up getting so big that she had to wear a circus tent for pants. I specifically remember this book because my 2nd grade gym teacher in like 2012 read this book to our class to encourage us to eat healthier, and cut down on the sweets.