Emma* (not her real name) thought she’d finally found a way out. Late one night, while her partner was asleep, she spent twenty minutes searching for a family lawyer and reading through a domestic abuse support website, careful to close the tabs afterwards. Two days later, her partner brought it up. He knew which website she’d visited and exactly when. Emma had been careful to only ever use her own device, and she hadn’t noticed any new apps appear on her phone. What she didn’t know was that wee...