My husband has been off work for 3 months due to an injury. We live in the country and never lock our doors. For the first time in over 5 years I came home early from work to find the front door locked! It also took a while for my husband to answer the door. When I questioned him he first said he was worried about safety (he never has when I'm home alone and never told me to lock the door) then he yelled at me to shut up and got very defensive. Am I being unreasonable or is he up to something?