My 27 year old son moved into a home a block away. He has a good job and a good income, but he comes into our home while we are gone and "grocery shops" from our kitchen. He takes jars of salsa, cans of tuna, toilet paper, cleaning supplies, cereal, chicken; whatever he needs. He "sneaks" the stuff out. I want to remain on good terms with him but I have to end this. Any suggestions?