tell your cousin to look up the transaction ID. if she sent it via blockchain.info, she can look there to see what it is, or if it was a client she can open that up to check.
oh, and by checking your wallet it does not confirm that the wrong or right address was used.
it was from multibit wallet, can u show some examples of transaction ID?
i'm not familiar with multibit, but you usually just right click on the wallet and check out the transaction ID.. that's how it works with electrum at least.
actually, i just downloaded multibit, and it's probably under the "transactions" tab. with the transaction ID, you can see where the bitcoins actually went. when you pasted your (receiving) wallet, did you double check to make sure the address was correct?
if you have not received it in 6 days, there's a good chance you lost them though.