Being so big, you need to eat quite a bit of food to sustain yourself, but what happens when you’ve got significantly more food in your habitat than you need to stay alive? Well, this! Greed and gluttony, eating excessive amounts of food every meal, filling your belly to such huge degrees and getting used to it, it’s inevitable that huge massive amounts of weight gain will fallow, her belly swelling and growing, gaining more and more mass by the week, and once she grew big enough, which is right around this time in her gaining journey, she finds herself belching even when her belly isn’t stuffed to the brim!