Jake and Mary are married and own their home. The police come to the house and ask for permission to search the house for drugs. Jake gives his consent to the search, but Mary says no because she has hidden some drugs in the kitchen. The police come in and search, over Mary's objection, since Jake said it was okay. They find Mary's drugs.
they asked permission meaning they technically didn't have the right to search the house since they didn't have a warrant from a judge to search the house.