Harry Potter and the Coven of Life

When Voldemort kills Lily halfway her doing the ritual to protect Harry with her love, it has... side-effects. Two days later, Bellatrix comes to kidnap Harry from the Dursleys, but has to breastfeed him in a show of good faith, and is thereby enslaved to this innocent one-year old. Fluff. Kinda weird fluff. Lots of lactation. Some smut later on.