Second Chances Reality: Little Mockingbird

Sirius babysits two-year-old Harry Snape for an afternoon while Severus sells potions to different apothecaries. When Sirius lets slip a few curse words, little Harry begins repeating them. Will Sirius be able to make Harry stop saying those naughty words before Severus returns? A one-shot in the Second Chances Reality. Rated T for language.