Ofentimes, a series of exercises will better help the situation. A walk-in bath will guarantee that she won't be stuck or won't it?? LOL! Yes, perhaps some exercises and losing a bit of weight are better than just buying a walk in bath. But you know she is where she is now because of her weight and size and she might not be so lucky next time if stuck.
When my friend said she would add a stalk of celery, carrots and other greens into her meals, I said to her, "Why not, your children might shun them, but with time, they will come round and they will introduce the diet to their children and their children to their own children and what harm can there be?" Indeed, celery reduces the build-up of uric acid and instead of taking too much turmeric which can reduce liver functions if taken too much, a daily dose of other minerals and vitamins are good for the body!