definatly let it grow, but i would scrub down your grow room so theres no pollen around, the more pollen is put on the buds the more seeds, so if u had a little brush off onto your girl just let her grow, it will still be great homegrown bud, but youll find yourself a few seeds in the buds, only really heavly polinted buds end up like a seed pod that looks like a nug, and they still have bud u can smoke on em.