<Ai went pee-pee, so please wipe my crotch~♥
>Ai-chan, even though you're in your last year of kindergarten you still wear diapers all the time and ask to be changed.♥
Literal translation: Ai-chan, you're a JY3-san* but still asking for help with your [favorite/habitually used] diapers
<Mou-! Ai asked you to wipe the pee-pee off but now there's white pee-pee all over me!! Uu~ it's all sticky
>Sorry Ai-chan, you were spreading your pussy so I got excited and felt like cumming.
Image 3: Omake (bonus or extra content)
<Ai likes it when you pyu white pee-pee onto her crotch♥
>So you like the feeling of gloopy semen squirting all over your crotch♥
I wasn't really sure how best to translate 股 (butt/crotch). I couldn't think of a good word which sounds childish and has the right meaning. In general I'm not the best at writing good English dialog, so feel free to adjust things as you see fit.
*Kindergarten (JY) is generally divided into three years called 年少 (nenshou/junior), 年中 (nenchuu/middle) and 年長 (nenchou/senior). Generally kids turn 4 in nenshou, 5 in nenchuu, and 6 in nenchou. They turn 7 in their first year of elementary (JS). This girl is in nenchou so she's probably 5 or 6.