Redefining Normal - Again

Well, our normal is going to have to be redefined again after this week. When Dennis's parents split up to begin with Dennis made the offer to both of them that one of them could come here and live with us if needed (their hardly making it financially together, let alone apart). And, yes, he checked with me before he did that :P Anyway, so Dennis' dad is taking us up on the offer and moving in this upcoming weekend. We're moving some stuff around and getting the house ready now. Good thing his class ended last week so he can help me! But yeah, so we are once again working on redefining normal around here. I'll let you know how it goes. Any tips or advice?