I’m sorry to read your post. It’s very hard for you to deal with and to know what to say to your daughters. If you would like some help please contact us at Icarus Trust as we are a charity that supports people having to deal with addiction in their family. We have trained and experienced people who would talk with you if you get in touch which may help you to know how to move forward.
You can contact Icarus Trust on help@icarustrust.org or visit our website http://www.icarustrust.org
Good luck.