A Walsall teaching assistant helped her husband secretly film young girls undressing and having baths after holding pool parties at their home, a court has been told.
Rosemary Foxall, 49, ran baths for the children while her husband Martin filmed them using cameras hidden in the loft and bedroom of their house, Wolverhampton Crown Court was told.
The offences are alleged to have happened over eight years at the couple's home in Brownhills.
Foxall denies 10 counts of making indecent photographs of children and one charge of possessing indecent photographs of children. Her husband committed suicide, shortly after being questioned by police about the allegations.
The court was told that girls were regularly welcomed to the couple's home to swim or play on their water slide.
One girl said she would visit about four or five times a week.
In a police interview video played to the court, the girl, who cannot be named, said Martin Foxall would go up into the loft while she got changed in the couple's bedroom.
She said: "After being out we would go and get changed. When we were in the bedroom you could hear him moving around."
The prosecution alleges that Foxall knew her husband was filming them.