Found out DH has been leaving my DS who is 7 (8 in October) alone in the house for about 15 minutes while he goes to Costa and back in the car. The first time I returned unexpectedly and my DH had locked my son in so I had to tell him where to find my house key and let me in. I said to my DH I wasn't happy about it given DS age and also that he hadn't even told him where to get a key if he had had to get out in an emergency. He said he wouldn't do it again but two weeks later I caught him again (I had come home due to terrible traffic). I didn't ask him about it as I was so angry but he hasn't mentioned it so I think he will continue to do this. I don't think I normally overreact but I'm not sure?!