What movie is this?

Okay so I'm having issues with figuring out what movie I'm thinking of
and I can't get it out of my head.
So it was like these two girls or whatever, and one day this lady
asked the other lady if she could pick up her son from school or
whatever and the second lady never came and got her son that night. I
think that the first lady gave the kid to his dad and the first lady
tries to go out there and find out where she went and I think that she
ended up killing her sister and drowning her in a lake or whatever.
She ends up finding her and she was arrested. And also the second lady
was leaving the first lady like notes or something to help find her or
whatever. And the reason why the second lady dissapeared was I think
because she got a letter or something at her work and it was like a
picture of her and i think her sister? It was released in 2017-2018
and I tried to look for it online and googling all of the movies that
were released through those times but I couldn't find it.
Please Help ME!!

Anonymous2020-11-04T22:50:27Z

Favorite Answer

A Simple Favour with Anna Kendrick and Blake Lively