2 accounts 1 computer 90 day login limit

my husband and I only have one computer which we share, we both have iPhones, therefore we have separate appleID for purchasing music etc.

he has recently logged onto the computer, downloaded his recent purchases and burnt to CD to listen to in the car, I have tried to do the same today but can't.

iv spent a fotune on music that I can't download and burn for still another 51 days! How can I make it possible for us both to use the one computer without the 90 day limit between each login?