That's definitively an interesting fantasy. Unfortunately, I can only imagine it currently 😢
One of my fantasies is that my “girl” has had a bad attitude lately and I decide she needs some attitude adjustment! After a nice dinner at home, we do the dishes and when we're finished I order her to come with me. I sit down and she's standing in front of me. “I recognized you've been quite a brat lately. Is there anything you wanna say about it?”, I ask her. She immediately knows, she has pushed things too far in the last days and apologizes, for being late, for speaking back, for not doing chores or her homework…
But it's too late. I interrupt her “Stop it! You know you need a punishment!”. “Please, no punishment, I'll be good. I promise. Please…”, she stutters. “Undress and bring the wooden spoon to the bedroom!”, I order her. She accepts and slowly starts to go for the spoon which is placed on the kitchen counter as a permanent warning. And I think this warning will have more impact again, soon.
We go to the bedroom and my girl starts to undress. Just before she pulls her panties, she looks up to me and asks desperately “Daddy, do we really have to do this?”. “You know the answer. Do we have to do this?”, I reply. She sobs and - knowing the consequences for not accepting a punishment - she admits “We have to do it because I've been a bad girl” and pulls her panties down. I order her to stand in the corner and I prepare an enema bag, which I hang up at an improvised IV stand which I put next to me. I sit down and tell her to lay over my lap. She's looking at the big enema bag - she really dreads enemas. I hold her firmly with my left arm and get the spoon with my right hand. I start the punishment and she counts the slaps loud. In the beginning, she takes them quite well, but after the first dozen swats, she really starts to get uneasy, but I just grab her tighter.
A few more swats and she yells “How much more?", but I continue the punishment until I feel she has learned her lesson. I readjust her position in a way that her belly can distend between my upper legs. I spread her reddened butt cheeks and insert the nozzle. The enema starts, my girl is sobbing. She soon starts to squirm and begs me to stop the enema, but she has to take it all and I make sure she really does.
After a few minutes, she has taken the whole bag and we go to the bathroom, where she is allowed to expel the enema, while I clean the equipment. When she's done, I put her on my lap again and hug her. “Have you learned your lesson?”, I ask her. “Yes daddy, I learned my lesson. I will be the well behaved girl you want me to be", she answers while smiling at me. But we both know, that we will have to repeat this treatment soon, as the warning spoon on the kitchen counter will fade out and just become a piece of decoration until its next use.
So, yes, I do have that fantasy as well. Sorry for the long post :/