Feeling the plug

Cunt spent the day feeling the plug inside. The plug that Master requires cunt to wear. Its cunt needs to get used and surrender again to being constantly filled and spread open by the plug, and that gives a submissive feeling. Constantly that feeling of being penetrated. Sometimes a bit sore and sometimes causing horny glows. Riding on the plug to stimulate its cunt, feeling it move inside, feeling it work against its prostate. The slave cock swelling but getting nothing but painful pressure from the cage.