Status Updates From What Happened to Nina?

Things are happening....there are lots of hints but nothing concrete....could Simon took grace and is there any ill intentions there? They keep mentioning where's ninas father but if his involved some how seems far fetched. Simon has admitted he hurt Nina however could the reason be grace..they also mentioned she was talking to someone else

No twist and turns so far ..first audio book thriller. I'm enjoying it because each character has a different voice and it's not a lot of characters. I am intrigued why so far it's pov from both parents..so we don't know much about Nina and Simon...we knew she was dead but I had hoped that she wasn't