Whats that movie where theres this little girl who was thrown in a well an the mom jumped off a cliff?

like the mom had a little boy and then the girl who was throwin the well got pissed i think and posessed the boy then in the end the girl comes on the tv and goes all MOM or something and the little boys mom touches the screen and the girl pulls her in and she ends up in a well and she has to climb out but te girls down there too and she climbs up and pulls the well top on and then jumps off a cliff and then happily ever efteR?