That’s what ring guards are for. Plus, she can afford professional re-sizing. You don’t shed a wr over weight fluctuation.
Been through cancer and chemo twice. The drugs can make you retain and drop water very quickly. Your size changes often so resizing a ring with weight changes isn’t reasonable. Also chemo can leave you with fuzzy thinking, it is an easy time to loose things. Taking off the ring for a couple of months is the easiest answer.