Scott Duncan
You need to take advantage of this dialog!
Instead of "A smart man told me that a signature represents CONSENT and UNDERSTANDING", grow a pair, and say that you read the works of Scott Duncan, and that he showed you that a signature LEGALLY is PROOF of CONSENT and UNDERSTANDING. LEGALLY it cannot be anything else. This being the case, you will thank her for refraining from attempting fraud, in the future, and kindly request that she fucking stop.
:D