I know my MIL is a snoop, but we still have them house-sit.. They were here a few months back, and I made sure there was a suprise in the 1st drawer (the easiest thing to access in our room), and suprisingly nothing our room was touched..
All the kids clothes were put away, the rest of the house was spotless, and my sheets changed, but mine and DH's clothes were left on our bed (she used to put them away and it iritated me!
And we allow them to house-sit because they are DH's parents, and that is just the way she is.

