I Lied To Him That My Parents Are Rich, Now He Wants To Visit Us...what should I do?

Actually, I am from a poor background.
I met this rich dude and I thought he wasn't going to be serious with me! So I lied to him that my parents are well to do! We have been talking for the past 3 months, but I didn't tell him the truth.
Now, he wants to come visiting my parents. How do I explain the one-room I live with my two sisters after lying that we are very wealthy! What do I do?