The Cement Garden is a 1978 novel by Ian McEwan.
In it, first the father and then the mother of four children die. The children hide their mother's death from the outside world to avoid being taken into care, encasing her corpse in cement in the basement. Her teenage son and daughter descend into an incestuous relationship, while her younger son starts to experiment with transvestitism.
The film was adapted into a 1993 film of the same name, starring Charlotte Gainsbourg and Andrew Robertson . [1]