[US] Perfect Sisters (2014) Based on a real-life incident, two sisters manage to cover up the murder of their mother but their story unravels when they tell their friends.

Perfect Sisters (2014)

Crime, Drama, Thriller [1 h 40 min]
Abigail Breslin, Georgie Henley, Mira Sorvino, James Russo
Director: Stanley M. Brooks

IMDb rating: ★★★★★★☆☆☆☆ 5.6/10 (3,913 votes)

On January 18, 2003, police, alerted by a frantic 911 call from a distraught pair of teenage girls, arrived at the girls Toronto area town house to find their mother dead. It appeared the 44-year-old alcoholic, having slipped into a booze-and-pill stupor, drowned in her own bathwater. The death was ruled accidental by the authorities. In the months that followed, however, police were alerted to rumours and reports that the teenagers had been gossiping to friends about the accident. Police began piecing together rumours that suggested the teens might have had a hand in their mother's death. In fact, rather than an accident, the story that emerged portrayed the two teens as cold-blooded, premeditated killers. (IMDb)

Critical reception:

The film received generally mixed reviews with a 30% rating on Rotten Tomatoes, and a 44% rating on Metacritic based on 8 reviews. (Wikipedia)

More info at IMDb, Wikipedia, Rotten Tomatoes, Metacritic, Wikidata.
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