Nice "Start"...
We have all been through what you are going through now. Remember honesty is always the only way to approach such a difficult situation.
Simply explain to your wife calmly and clearly that this is your last order. Although, you firmmly believe that a Cigar Smoker can never have too many cigars.
Then hide them anywhere you can think of and get to the USPS guy before she does.
It worked for me! =)
Regards,
B