I am not hag's hair

Written for the summer 2015 SS/HG promptfest Prompt from Iuls: When Eileen Snape resurfaces several years after the war and begins interviewing suitable marital candidates for her son, Hermione is both alarmed and intrigued. Severus is mostly just alarmed. It's her wedding day, and Hermione looks back at how the hell she ended up marrying Severus Snape.