Diane is sleeping peacefully, that is, until she wets the bed . . . Again. Lately she's been having a problem holding her bladder in her sleep, and she's been doing her best to hide it from the rest of her family. But today, it just gets to her waking up in yet another wet bed, wetting another set of seats and wetting all over her favorite PJ's. Girls her age just shouldn't be wetting the bed, and she breaks down crying.
Her crying is so loud it wakes up her sister, Joy, in the next room. Being the older, concerned sister, Joy walks into Diane's room and sees her throw the covers over herself. Wanting to know what all the crying is about, Joy pulls the sheets off only to see a wet bed. Joy can't really believe her sister wet the bed, but she sees she's obviously upset by this and has secretly known anyway. She helps Diane strip the bed and get the sheets into the washer before mother sees.
When Diane comes back still wearing her wet PJ's, Joy helps her out seeing Diane is so distraught she's just walking around in obviously wet PJ's. Joy strips her naked and holds her close to comfort her little sister before sending her off to take a shower.
While her sister is in the shower, Joy pulls out her iPhone and starts googling medical supply stores. She doesn't want to go to the grocery store and everyone see her buying goodnites after school, but she's a little surprised that the supply store only carries adult briefs, but the clerk assures her for a girl her sisters size, the briefs will do a better job of keeping her dry at night. Joy agrees and hangs up the phone just in time to avoid being caught by Diane. To brush it off, Joy just claims she was on the phone with their Daddy who's overseas on a business trip.
Later that day, being a Friday night, their mother is out for the night so Joy gets to babysit. Of course, what do two little girls do but steal their parents room when they get a chance, right? But this is when Joy drops the bomb on Diane. If they're going to sleep in mommy's bed, then she needs to wear a diaper. Diane cries a little, but Joy reminds her that it's ok and this will keep everything dry. And if it makes her feel better, she'll wear one too!
So both the girls take turns stripping off their PJ's and putting a diaper on each other. Joy keeps reassuring her little sister, but Diane isn't sure she'll be ok wetting it. So Joy, being the loving older sister she is pulls down the butt flap on her PJ's and starts wetting herself. Seeing her older sister not having a problem, Diane pulls down her PJ's and shows her sister that she's ok wetting her diaper. Diane is really reassured by how well it held and that it didn't leak. That means no more hiding sheets or washing her PJ's.
After a quick diaper change into dry diapers, the two settle in for bed and fall asleep.