I wrote one with a similar premise (possibly the one you're thinking of?): Past Imperfect (http://archiveofourown.org/works/480418).
There is also some lovely non-con involving Obie and that scene in the delightful The Mathematics of Betrayal (http://archiveofourown.org/works/73283) by Atrata.
no subject
There is also some lovely non-con involving Obie and that scene in the delightful The Mathematics of Betrayal (http://archiveofourown.org/works/73283) by Atrata.