I recall reading a story where Hermione's staying at Grimmuald place and is pulled into a twisted relationship with Sirius and kreacher., who was secretly orchestrating it from the beginning. It's slightly NC, Sirius becomes VERY possessive, can't remember what time-frame it was set during, everyone was still alive. And there was a scene of Sirius and Hermione eating... I think, cherries, in the kitchen.
Any help is appreciated!!