I am\was a gambler. 200 days clean do early days.
The steps I took with the help of my husband was to:
Contact gamcare for counselling, they can also offer you counselling as well.
Have control of all finances to my husband including him having access to all three credit agencies do you can check to make sure no credit is being used for gambling.
Register with GameStop and self exclude for the max time allowed. This will then self exclude from all UK gambling commission sites.
Read and post on the gamcare forums. I maintain a recovery diary there and it does help.
You can also put gambling blocking software on phones and mobiles to stop that.
I was never into shop gambling but I think there are similar schemes for self excluding. Not sure how good they are.
She has to want to stop though.
It may also be useful for you to read the friends and family posts on the gamcare forums. It will open your eyes as to what you are dealing with, and you need to be aware to protect yourself financially.