Hi Ladyb.
It is too bad that you feel used. Perhaps you are a little too sensitive. right now.
Do not use this as an excuse to drink.
Were your sons cooperative and helpful when you were drinking? How old are they?
Can you give them a list of things that you expect them to do? are they dependant upon you for any of the money they get?
Maybe it is time to make some rules for them to folloe. I am asuming they live under your roof.
As for your sister, emails can be left unanswered if they are bothering you. It is time to stand up to her and not let her influence your recovery negatively.
You definitely don't have to drink though and you know this.