Periodically.

The shower's still running beside us, and the stray droplets make me flinch.
"Why so hot?"
He moves his hand under the stream, unaffected.
"I like to practice burning in hell."
"Mother wanted you to stop thinking like that."
I shiver as he runs a finger down my arm.
"Mother won't know."

That's right, she won't.
Mother doesn't know anything.