I'm a 74 yr old retired man, who feels the same - luckily I came out to my wife of 50 yrs a couple of years ago, and she accepts it, although reluctantly.
I have both frilly and boyish platic pants, pink disposables, and probably about $1,000 of "double satin panties and bras".
I love the feel of both a frilly bra and soft cloth diaper and other variation. I have spotted some frilly baby diaper dresses with matching diaper covers, but I'm afraid to order as it may just push my wife too far.
Always been this way, but limited activity with family and kids until retirement and the grandkids are in school full time and not underfoot.
Have some Velcro closure shorts kilts/skirt to wear over my diapers, good pair of comfortable MaryJanes, and a short top to complete outfit.
Love wearing skirts with knee socks, bra, and diaper as well.
Just a SISSY/DL - don't know why just DO!