Big Brother minx Sylvia Barrie has been acting out a lie to hide a saucy secret – she and new boy Stuart Pilkington were a couple BEFORE the show started. She and the hunk hooked up during a trial run in the Channel 4 spy house and the sparks really flew between the randy pair. So producers decided to put them both in the house for real, banking on the fact that their sizzling romance would keep ratings soaring. They ordered Sylvia and Stu to put on an act, pretending that they had never met before - and threatening them with the boot if they blab to housemates. But housemates and viewers noticed that Sylvia, 21, started to behave strangely as soon as Stuart, 25, arrived in the house. She even slipped into his bed for a chat and cuddle just hours after his arrival. Stu has tried desperately to distance himself from Sylvia, who faces eviction tonight, but she has continued to stalk him. And now we can reveal that south London girl Sylvia has simply been trying to rekindle the romance she enjoyed with the Cheshire fitness trainer when they met weeks before BB9 even started. A show insider revealed: "We have a few one-week trial runs before the real show, just to see how different personalities react to each other. "Stu and Sylvia were explosive. They had a full-on fling and ended up kissing passionately. "Producers insisted they should be put in the main programme. We were hoping for the romance to blossom - and by the way she is acting, so did Sylvia! "But Stu isn't having any of it. We fear he realises just how unpopular Sylvia has become and doesn't want to be tainted by it.