The chores

For this particular plot, you might need to play a little group of characters, minimum 3.

In the high school, a group of boys are regularly enjoying fighting and trouble making in all sort. Tired of all the insubordination, the head master sentenced them to do some chores around. In particular doing house chores in his own apartment he got in the school area. Of course if anything was missing or any degradation would be noted, they would be immediately fired definitively. Some kind of ultimate warning.

But a fact was not scheduled...His wife was at home and wasn't supposed to be there.

After coercing her into sex, they gradually corrupt her and turning the quiet housewife into a cumdump. Several ending possibles.