1. Extra Stuffing!
At first glance I thought that she might have stuffed her back pockets but later I realized that the bump was not actually in her pockets. In fact, the pocket area which usually tends to be bumpy usually is actually not and the curves she is having are pretty much weird. She seems to be travelling it might be the possibility she has stuffed some material into her jeans which wasn’t accommodating in her travel bag, and that stuffing is just misplaced.