No, she is not allowed to do that:1) A loan agreement--even if it was an oral (unwritten one; often incorrectly called a "verbal" agreement)--is a contract; as with *any* contract, it cannot be modified or changed unilaterally, or by one of the parties on her own: it can only be changed by the consent of both parties. So she cannot decide to withhold more than you and she mutually agreed would be taken out.2) Furthermore, money may not be taken out or withheld without employee consent (agreement), unless required by law (e.g. court-ordered or IRS wage garnishment). Therefore, she cannot take out more than the amount you had consented to.Therefore, there *two* reasons she cannot do this. If she will not go back to the original agreement, try contacting your state department of labor; they may be able to help you. If they do not, you could sue her for the improperly taken out money.