You'd think the wives of sorcerers would know what their husband is up to, right? Being that sorcerers masturbate nightly while chanting spells. So how do they hide it?
Room enchantment - by a high level sorcerer.
Either the husband (if he is capable) or a high level sorcerer in his guild or cult will enchant the room - typically a walk in closet.
When you walk inside and close the door, all noises go silent. No sound can get out.
The walls and ceiling become translucent - and you can see the stars as if in the center of wilderness with no light pollution.
And you can see each person performing magic nearby - a pillar of light shining into the sky.
They switch to showering at night - but it's actually a ritual cleanse before performing magic in their enchanted room.
Do you live with someone who showers at night? Not to knock night showerers - but maybe take a closer look. They could be shouting spells in an enchanted bedroom afterwards and you'd never even know.
Oh - and the wives are typically mind controlled, too. (think Stepford Wives). So if they really saw something - it wouldn't take much to make them forget. Drug them, kidnap them from their bed, gang rape ritual, convince them it was all a dream - including what they saw with their husband. Return them to their bed. See if they remember in the morning. Repeat if necessary.
