Mrs Jackson's House

As a little boy with a troubled mother, little Jacob was often housed with Mrs Jackson who would put him in nappies and plastic pants for bed despite being 4 years old and even older and not a bedwetter.
He absolutely loved it.
As a 19-year-old, he now wanted to re-experience those nappies and the need to be babied once more.
So, would Mrs Jackson still want to put him in nappies and what about her daughter Sophie who was only a couple of years older but vastly more mature?
A story of hoping for the best.