A not-so-holy trinity: A Louisiana priest is arrested after having a threesome with two dominatrixes on his church's altar.

Rev Travis Clark, 37, is facing obscenity charges for having a threesome with two adult film actresses in his church.

How did this happen?

On Sept 30, the lights inside Saints Peter and Paul Roman Catholic Church in Pearl River were on later than usual. So a passerby decided to check on the church.

What the onlooker saw was quite a surprise.

Peering inside, the passerby saw the parish's priest half-naked having sex with two women on the altar. The women were dressed in corsets and high-heeled boots.

There were also sex toys and stage lighting near the altar.

And as if that wasn't grotesque enough, the onlooker saw a tripod-mounted cell phone and camera, recording it all.

The unidentified witness then captured the sexual encounter in a cellphone video before calling the police.

Responding officers said they found the two women in corsets and high-heeled boots when they arrived at the church. They were also 'light setups around them as if they were filming some type of event.'

The police, however, didn't find the priest at the altar when they entered the building.

He eventually appeared and told the officers that the women were 'guests and friends' who had permission to record a role-play.

But the officers had already reviewed the threesome footage the passerby recorded.

So, they arrested the priest for 'obscene acts [that] occurred on the altar, which is clearly visible from the street.'

They also arrested the two women, Mindy Dixon, 41, and Melissa Cheng, 23.

Dixon is an adult film actress and works as a dominatrix.

A post on her social media account said on the day before that she was on her way to New Orleans to 'defile a house of God' with another dominatrix.

On her website, she describes herself as 'the embodiment of sin exquisitely crafted into flesh and bone.'

She writes:

"Come to my flame, little moth. Feel the heat from my fire and prepare to burn for my affections."

"I have been told I am an addiction, a disease for which there is no cure. My beauty is intoxicating; taking a sip is not recommended for the faint of heart."

"I am highly skilled at weaponizing lust and using it to bring men and women to their knees."

On Twitter, she calls herself, 'Proprietress of the Church of Satanatrix.'

Following their arrest, the Archdiocese of New Orleans said the church had suspended the priest from his services.

Archbishop Greg Aymond also visited the church days later to perform a ritual that'd restore the altar's sanctity.