Law / Australian in Warsaw married a Pole - Polish permanent resident permit advice [6]

Hello all....
I am an Australian living in Warsaw and have my Firm here...
I am married to a Polish citizen for 5 yrs and moves to poland 2007..presently i am planning to apply for a permanent resident permit and the requirement is married for at least 3 yrs and living in poland for at least 2 yrs these clause i have fullfilled..

My question is that i was informed after submitting my application that i will be interview separately with my wife to determine if our marrige is real..

Can anybody out there give me tips of question that might be asked ? i need advice specially from those who has gone through the same process like me..

i appreciate.