Was he.....????(PossibleSpoilers)

I haven't seen this, but I don't mind the spoilers. Watched the trailer though. So, the guy was an unfaithful husband, and he thinks his former mistress was a stalker and drives his family off the road? Kind of seems that way. BTW: LOVE Ben Barnes! LOVED him as Dorian Gray!BTW: Was the older woman he was talking to in the trailer supposed to be his mother?