T is for Tampons

13 year old Sophie think's she's dying, until Bellatrix informs her she is in fact not. Unfortunately, it's up to two 19 year olds: Bellatrix Black and Severus Snape, to teach Sophie about her newfound womanhood. Now they're off to the muggle shops to show Sophie a thing or two about life, and pick up the essentials. Crack! Modern AU. 17 years before OP.