A married Sydney couple have been jailed for "disturbing" sex crimes against their nine-year-old son.
The man, 57, and woman, 49, who cannot be named for legal reasons, had pleaded guilty to sexually assaulting the boy between January and November 2009 at their suburban Sydney home.
The father has also admitted streaming footage online of his wife and son engaging in sex acts.
At Sydney's Downing Centre District Court on Friday, Judge Anthony Garling sentenced the man to serve a minimum nine years' jail.
With time already served, he will be eligible for release in November 2018.
"This man was sexually abusing his son and I have no doubt he was doing it for his own sexual gratification," Judge Garling said.
The man pleaded guilty to two charges of sexual intercourse with his son and two counts of committing an indecent act, as well as using the boy for child pornographic purposes, indecently assaulting him, possessing child pornography and using the internet to offend.
The offences included performing oral sex on the child, "massaging" his penis and having the boy do the same to him.
"It is hard to imagine a greater breach of trust than what the male offender has committed," Judge Garling said.
"This is his son, who was entitled to be protected by his father, not abused by him."
The woman was sentenced to serve at least three years and nine months in jail after pleading guilty to sexual intercourse with her son and two counts of committing an act of indecency.
The offences included the mother performing oral sex on her child.
She will be eligible for release on parole in August 2013, taking into account time already served in custody.
"(The woman's) attitude to these offences is almost unbelievable," Judge Garling said.
"She blames her husband and I am satisfied that he did have some domination over her. However, she seems to believe it is acceptable to carry out sexual acts with her nine-year-old son.
"She, like her husband, seemed to think that if her son did not protest at the age of nine, he is consenting and indeed enjoying it.
"If that attitude is true, it is disturbing to find parents with that attitude in our community."
Judge Garling found the boy, who is now in DoCS' care, had suffered "significant emotional harm" as a result of the abuse.
The court has been told previously that the woman intends to divorce the man and wants to have nothing more to do with him.
- AAP
Couple jailed for sex with 9 yr-old son
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