How long is your family staying? If it's anything less than 2-3 weeks I'd take my chances and not even bother going to the local fuzz. In the extremely unlikely event you get popped, claim ignorance and talk your way out of it.

Also, you say you register with the police every time you return from overseas. If you are on a residence permit, which I assume you are since you are working, you don't have to do that...only register once, then you're done.