Nice! I recently had something like this happen in my life, too; One of my close friends revealed to me that she was into being a little, but it was disturbing her because her husband is against it because he thinks that it's only a sexual thing that he thinks is "freakish and wrong". He lacks understanding of it, and doesn't want to understand. So because of this, she's mortified of him finding out that she wants to explore that side of herself. She asked me what she should do, so I told her that she should do what makes her happy. So she then requested that I help her to embrace her little side, so I went and got a diaper from my stock and showed it to her, at which she blushed wildly for a moment then layed down on the bed so I could diaper her. I helped dress her in her footie pjs (that I gave to her around 2 years prior), and I gave her a paci to use. About half an hour in we took a nap, her falling asleep laying on my chest, me stroking her hair gently. Around half an hour later, we got up and she wanted to go get some food, so we went (where else?) to Wal-mart... with her still dressed up like a little! Surprisingly, not very many odd looks were given (it is Wal-Mart, after all; all manner of people shop there). Almost an hour after we got back from the store, she actually peed herself without warning me first; I realized it when I recognized her blankly focused stare at nothing coupled with a cautiously shallow rhythmic breathing pattern. Thankfully, she has a child's bladder anyway, because Certainty's don't hold an extreme amount, but it was enough for her. Afterwards, she looked up at me and blushed again, to which I just smiled and said "Does baby feel better now?", to which she blushed even harder as she clutched her plushie and nodded shyly. After telling me she wanted to stay in it for a while and doing so, I changed her and cleaned her up, I changed her back into her big girl cloths and got her ready for her husband to come pick her up. To him, none of this happened, but between her and I, it was a special time for us to remember. *sigh* All in all, the day was really peaceful, blissful, and carefree. And that's what a good daddy should always strive for for their little ones.
I was a little uncomfortable about the whole 'going behind his back' thing, as he's as close a friend to me as she is, and I don't want anything to break that friendship. But the only one that doesn't understand is him, so he needs to find the understanding himself before he can be okay with it, and that's fine. In due time. Until then, we'll just go about things as they are.
From a deeply psychoanalytical viewpoint, the desires to care for, or be cared for, stem from an inherent lack of that part of your growing up, or from a need to recreate the environment in which one can mentally regress or revisit the better times in their childhood when things were better for them. That's basically the gist of infantilism at its root, but then again, everybody here at ADISC already came to terms with that, haven't they?
I hope my experience with my friend can offer you some ideas of what you can do with your cousin to better his first time. A checklist of things to have at the ready just in case he decides to go through with the AB part after all:
Footie pjs
Super soft blankie - I recommend velvet or microfleece.
Plushie or stuffie - inquire as to his favorite character(s) that would be on the market as plushies.
Pacifier - "NUK 5" is my personal choice, as I find that baby sizes are too much effort to keep in without focusing on them.
bottle (optional) - enlarge the hole in the nipple ever so slightly to increase flow slightly, otherwise it's just tedious to empty.
powder, oil, wipes, etc. - you never know. "Be prepared." -- Boy Scouts of America.
Anyway, that's enough from me for right now. Good luck. *fingers crossed for you*
Cheers mate,
Alaester Nikolai Modern.
