The new DNA security system required deep samples from her throat as well as a full body scan, before she could get into her house. Often the security guard she hired would also have to conduct a full body cavity search as well. He made sure to use the tool best suited for the job of cavity searches, so she almost always ended up with his cock in her cunt, ass, and mouth (in that order) before she could get into her house, but at least she was safe.