It didn't take long for Black Cat to put her full plan into action. Unbeknownst to her, of course, it was all the symbiote's doing. From day one that it met her it had its plan to grow in power and eventually replicate, but Cat did do her part well, and continued to. Black Cat attacked the world on three fronts: herself, Rogue, and Spider-Man.
Cat, with her knowledge of people in high places, having frequently stolen from them, was able to infiltrate the highest levels of government and beyond and seduce her way into power -- behind the scenes of course; she didn't want to alert anyone to her movement. It didn't take her too long to corrupt everyone she needed to. They were already men of little moral value and took to her like a duck to water, falling under her spell almost instantly. And with the help of the perfume she wore, they were all too happy to let her meddle in their business affairs. She also went after some of the heroes with high influence, like Tony Stark and Reed Richards.
Rogue worked on the mutant population, starting with the X-Men, of course. She had to be far more aggressive than either Cat or Spidey as she was dealing with several telepaths and so they had to be dealt with first. Seduction was easy once she got close enough for them to take in her scent. Like Spider-Man, some had to be contained and "persuaded" to their side. Xavier proved far too difficult and so was just snuffed out entirely. She had no difficulty getting Gambit to her side once she showed him her powers were under control, and that night he proved himself to be the perfect Spider-Man to her Black Cat. That didn't stop her (or anyone else) from sampling the other fruits of the mutant world, of course, and Gambit was also put to work on seducing some of the more resistant women. Wolverine, too, was a bit of a fighter -- more so than the other mutants. Luckily he was eventually broken in like the dog he was instead of being put in the ground along with Xavier. Rogue had the best luck with the Brotherhood. It took her only a night to get them all under her spell, and all at once too. Boy was she sore. Emma Frost practically volunteered herself and the rest of her crew. Having a powerful telepath on their side so early on proved useful as the influence spread.