MacBook in shop - iTunes on external - use other MB?

My MacBook is in the shop. I keep my music on an external drive. My husband also has a MacBook. Anybody see any problem hooking my external to his MB, changing the iTunes library to my external, updating podcasts and iPod, then changing the library back to his (also on external, but not the same one)? While mine is gone, I'd love to be able to update and listen to current podcasts. Would this idea work? Would it be easier to create another user for me on his MB and go from there? No real need otherwise for a user account for me, but if that would be better we can do it.

Any better ideas?

Thanks in advance!