Darrell,
Are you any good with your hands? I make my own inflatable nozzles from stuff you can buy in Home Depot. Not only are they better than the bought variety (because I tailor them to fit MY rectum) but they also last longer and never leak. In case no one told you, the balloons on most inflatables leak via the valves on the squeeze pump.
Just search my posts for design descriptions, or if you can't find them, send me a message. But I think most of the other members here would agree with me for saying that we hope you find a way really soon to tell your wife about this side of you.
Even if she can't join you, she must know; or the secret between you will eventually corrode your relationship. Trust me - I have been married for 46 years to a marvellous companion, lover, friend, and supporter who can't stand enemas but understands that I need them.
I was lucky in that respect. Soon after we were married, I got a serious digestive upset (from some dubious mushrooms, we think). Anyway, my bowels stopped working entirely. But that wasn't all! My stomach seemed to be fermenting its contents instead of digesting them, and I began to belch the most disgusting smells imaginable. It tasted vile, but it stank worse. Dog farts had nothing on this; people turned pale and conversation faltered. It wasn't that no one could think of anything to say; but they just didn't dare breathe until the air cleared. They were scared of vomiting!
As we were staying with her parents at the time, everyone looked accusingly at her and said,
"DO SOMETHING! NOW!"
My spouse is a nurse, so her thoughts turned at once to enemas. She found an old bulb syringe among her mother's medical supplies, summoned me discreetly and got busy. I realised what a heaven-sent opportunity this was to come clean without offence, so I let her know how much I was enjoying her attentions to my bum, even though I was actually feeling pretty second hand. The enema required well over twenty insertions (yum!) of the small child's syringe.
I can't tell you it cured my problem, but it did get my bowels moving again. I was then wisely confined to isolation until the revolting stench vanished, but the enemas were out in the open!
Johnny
PS (for Susie) Any idea what happened to me?