Hi Georgia,
Thank you for sharing your story I’m sorry that you are going through the same anxieties with your husband that your dad must have done with your mum. That must be so difficult for you.
Your husband is going to support groups and maybe talking through how you are feeling might help you. I work for a charity called The Icarus Trust that provides support for people who are dealing with the addictive behaviours of a family member. If you get in touch you could speak with one of our experienced trained people which might help you to make sense of what is happening and find a way forward.
You can contact us on help@icarustrust.org or visit the website http://www.icarustrust.org
Good luck. I hope you can find some help.