My Middle-aged Female Mail-carrier

It was pouring wet, and I was in my rubber bondage-bag, in my recliner, wanking slowly and intensely, when there came a tap at my front door, twenty feet or so from my position - a quiet voice said "Can I step in for a minute? Got something that needs a signature - OMIGAWD!"

She hurried over, and deftly closed the main zipper of the rubber bag under my feet, trapping me inescapably in thye strong rubber-lined rip-stop nylon bag. "Wow! what an unexpected delight! You're in big trouble now, young man...exposing yourself to a respectable older lady - I could get you jail-time for that! However, it so happens my rent lease is up, and I need to find a place, like...immediately. I think I just found it, and now I can indulge my sadistic fantasies without limits or limitations...you paying attention, kiddo?"

Since she had also closed the air-tight nylon zipper across my mouth, leaving me only two small metal-ringed air-holes at my nostrils, all I could manage was a muffled "mmmmmfff" sound with a positive inflection, indicating my acceptance of things.

"Don't go anywhere! I'll be back when I finish, and we can talk! Or I'll talk - you listen! I always dreamed of masturbating a helpless male to an agony of delayed or denied orgasm, while he tried to beg - with me uncertain whether he meant stop, or don't stop..." She left then, and I lay there in scary uncertainty about my future - or maybe LACK of one...