"Oh that was a long day wasn't it?" (he nods) "Oh you are so obedient, no gag but still obeying, you may speak." "coughs, umm why am I locked like this and why the diaper?" "Well my Fifi, you are obedient and you didn't run away before, but I would be silly to leave you fee all night. The diaper is because you are locked up. Rest, another busy day tomorrow"