I've seen this movie last summer on IFC but never knew what it was called. plus, the last time i seen it i was atleast 12.
anywho, there's this sister and brother and (i think) they killed their moms' abusive boyfriend. then they get older, etc...and there's this mirror with some kind of powers, and things start happening to the people who live in the house that they used to live in. something along those lines.
any help, thanks in advance!!