I agree it's best to tell the truth as far as your family is concerned.
Myself, if I thought my kid was seriously trying, I would help any way that I could.
But if I suspected she was going to blow it on booze or drugs, I wouldn't give her a dime.
Some things only time can heal.
But you're here, and you're not drinking today, and that in itself is awsome!
You'll get by this somehow.