I'm sorry you have to go through that operation again, I had a triple in 2009 so I know how you must feel.
You are still relatively young so you should have no problems with the operation.
Your husband needs to support you not 'blame' you for what has happened.
Do you know if it was your graft that blocked up, or is your graft still open?
Did they use an internal mammary artery when you had your last bypass or a vein from your leg?
They tend to use the mammary arteries now because they're supposed to last a lot longer.
My son in laws grandfather had bypass 30 years ago and is still going strong.