How do I convince my grandma to try an edible?

I don’t know if this is the right subreddit to ask but wtv. I live with my grandma and we recently had to put our dog down because of how old he was and he was super sick. A day after she feels unbearable pain in her left hip and doesn’t know why, I believe it’s stress and lack of exercise. I want her to try and edible because I feel like she’d be calm and it’ll ease her pain. Let me know how I should go about asking her. PS she is super religious and thinks weed is the worst thing in the world.