A Sydney man has denied drugging his stepdaughter to sexually assault, claiming instead they were in a consensual relationship.
The man, who cannot be named, is on trial representing himself and has pleaded guilty to 99 charges of sexual abuse starting when the girl was 12.
But he has pleaded not guilty to a further 33 counts of administering an intoxicating substance to commit a crime, with 22 counts relating to the stepdaughter.
He told the jury in his opening address he didn't "come here as an innocent man" and he didn't deny having an "inappropriate relationship".
But in his opening statement he said the pair "acted like a married couple".
"The relationship between [the stepdaughter] and I developed, and I'm sorry that it did."
Crown prosecutor Rohan Cooley alleges the girl's mother found SD cards containing hundreds of videos and images which showed him indecently assaulting the stepdaughter.
Mr Cooley says the girl appeared to be asleep in some images.
He has also pleaded not guilty to indecently assaulting a younger stepdaughter.