Most things are wrong in this thriller.
It starts with the title, which must have been selected by a robot. No relation to the story.
The casting is wrong. As much as I am a Susan Sarandon admirer, she just should not play young mothers any more; she is about 20 years too old for the part. Sorry, Susan, make that 10 years.
That said, she does a marvellous job as a woman on a journey into nervous wreckdom.
The script makes hash of a story which might have been saveable, it has good elements. The wasp espisode is underutilized, it has potential. As it is done, it is amateurish and weak.
The solution to the riddle, w/o wanting to give it away, is surprising enough, but not entirely plausible as far as the "bad guy" is concerned. It is not fully in character, which falls back on the casting and the actor.
The closing scene is sort of a minor quote from Psycho, but lacks the creepyness of Anthony Perkins in his cell.