Feeling the front and back of her diaper, pressing it against herself, she decides she likes the feeling enough to keep it on. "Yeah... It's not bad!" With a giggle, she pats the front, pressing the pee-stained diaper against her vagina once again. "Hehe, it could be worse!"
She starts rubbing it against her privates more, greatly enjoying the feelings she's getting from it. Another few drops of pee come out, but not nearly as much as last time as she continues trying to take in what she's feeling. She sits there for only a minute, though, before finishing.
Wearing her wet diaper, she washes her hands, not even bothering to wipe. With a bit of thought put into it, she decides to leave her panties off, returning to her room to put them away. She didn't want to risk anything happening to them, even if she preferred wearing a diaper.
She heads back out to play with Molly, sitting back down. Even despite Diana being smaller than most girls her age, often getting mistaken for a kindergartener, Jeff was still clearly too small, but Diana certainly enjoyed wearing such a tight diaper.
As the two girls continued playing, Jeff was pressed more and more against her virgin vulva. He began to enjoy it a bit more though. "Maybe I'll do this again, but permanent, once this is done." Diana definitely enjoyed it, and he started seeing the positives.
As weird as it was, he was still playing a brotherly role, protecting his little sister. Even if it wasn't the standard way, he didn't mind. He kept watching, the lower part of Diana's dress getting messed up and slowly rising. He was pretty glad he didn't have panties in the way anymore.