Realistically, whatever her role it was already done before she's picked up by Raynor. And you assume she was honest, when Tosh flat out said she's withholding something from Raynor about why her colonies keep getting invaded.
Rerun that part with Tosh along adn check.
She was hiding the fact that she was infested. Reread Blizzard's official statements about her character and check. She had nothing to do with the Hybrid project before, during, or after meeting Raynor.