Call your local Lufthansa office and ask for the station manager (or his assistant). If you explain the problem to him he might help you and authorizes the extra baggage.
If you are travelling from the U.S. to Europe you are allowed to carry two pieces (each not heavier than 32kg). If you are travelling within Europe you can take 30kg husband is not breaking his yourney longer than 24 hours in Germany the U.S. to Europe rules apply.
[This message has been edited by Tirreg (edited Jan 13, 2004).]