"I disrespected you. Please, forgive me my foolishness, my Mistress." he said with face on the floor

Oh it's ok sometimes mistakes happen.

"I am not worth of even greeting you in my house, my Mistress. I am nothing comparing to you." he said holding his face to the floor not even daring to look at her

Well I have seen your good deeds and I think you are amazing but if you feel like you have to make it up to me you could change me. She smiled

"Huh? What do you mean, Mistress?" he asked confused

Well if you look at me I'm sure you will notice.

He looked at her still pretty confused

She had a wet diaper around her waist.

He looked totally shocked at that.
"M-Mistress? I-if this is not problem, c-can I a-ask... why are you wearing diaper?"

I wear them because they are nice and comfy and my sister wears them too.