Thank you for posting. Please fell free to contact us at Icarus Trust if you would like some help answering your questions about your Father in Laws alcohol dependence. We offer support to people dealing with addiction in their family and speaking with one of our trained and experienced family Friends might help you to move forwards.
You can contact Icarus Trust on help@icarustrust.org or visit our website http://www.icarustrust.org
All the best to you.