Helping the children

My husband has been given weeks to live after battling a brain tumour for 11 years.  He is 45 and our children are 13 and 15.  They have never known him well but with them at the age they are now and him deteriorating rapidly now I am asking if anyone else is in a similar situation or is helping their teenage children with a terminally ill parent.  They dont know anyone else in their world who is going through anything like this.  In the midst of it all I want to help them with the loneliness of the struggle.  Thank you all.