How would you 'make' someone incontinent.
Assumign they're into diapers and willing to play games or wet & mess.
Give them the opportunity to use them. Specific to their fantasy. Punishment 'for fun' only if that suits them.
You made a mess; giving them pain or making life more complicated isn't going to long term encourage them for it to happen again.
For those with incontinence it's not usually a big pressure; can't hold; "oh no; i had an accident".
it's a cough; a movement or body position and a bit slips out.
for the fantasy of incontinence I'd say we want to remove the barriers preventing them just wetting.
so much so; that just wetting becomes the default behaviour; even if they aren't wearing diapers.
so; it's not a scenario; but it would seem to be very 1:1 and hands on. and that type of reality is somethig that most of us can't do.
but reassuraing;caring and supporting when wet or when needing a change; providing extra encouragement; minimise any negatives and defeinitely don't respond with any negative behaviours.
for example;
don't say "you stick of piss; everyone can smell you".
why: hot fantasy words; but not encouraging if you want them to do that again
do: wet diaper time! yes. that means cummies, is it going to be the wand or humpies this time ?
do: encourage them to minimise sexual activities unless diapers are involved.
I think making someone incontinent is a proces of 'having fun' like that; until it's acceptable second nature to do those things. to the point where they would prefer to have the diapers on so they can use.