A “deeply manipulative” stalker boasted online about concocting a “super duper defence” before claiming in court that she had been kidnapped and raped by an MI5 agent.

Jessica Nordquist, 26, was warned she faced jail on Thursday after being convicted of carrying out a prolonged and malicious campaign against her ex-boyfriend, Mark Weeks, who she met through work at a London advertising agency.

When the couple’s three-month relationship ended last year, Nordquist bombarded him with threatening emails from fake accounts, bought a fake pregnancy belly on Amazon to try and win him back and accused him of rape.

She was arrested in January but within days, made light of the police investigation and her suspension from work in a stream of social media posts.

She boasted about being on paid leave, enjoying lunch at the Ivy Market Grill and spending time at a trendy private members club after life handed her “an unexpected vacation”.

In March, she published a picture of herself in St James’s Park on Instagram with the caption: “Between building my super duper defence case with my lawyers, I find time to roam in the daffodils”.