Credence knows abuse very well. Alt. Universe where real!graves/Newt adopt Crendence, they're all very happy. One night, Graves and Newt are having super rough super consensual booty time. Credence hears muffled screaming and comes in and freaks the fuck out. Cue embarrassed Newt and v guilty Graves talking him down from flipping out.


http://fantasticbeasts-kinkmeme.dreamwidth.org/459.html?thread=710859#cmt710859
http://archiveofourown.org/works/10058171