I can't remember the name or much of a movie. Please help me.?

I only caught near the end of the movie.. But it was about two boys
who are hunting a couple to kill. Near the end they find the couple in
a house and well they kill them but they are killing them for a game
they are playing. At the end when they are in the house and talking to
the woman(They killed the husband already I think.) But they take her
outside and put her on a row boat.(The house is next to a lake.) And I
think the woman kills one of the boys while on the boat. Then the
other boy(Who is blonde) gets off the boat at another dock and walks
up to another house, he gets let in and the movie ends.

Sorry if I'm not give enough details.. But that is all I can really
remember. Any help at all would be amazing! Thank you all. :]