Katie looked at her friend and said, "Tiffany, I'm really horny." Tiffany smiled, she had always thought Katie was cute, and now sitting in front of her in this soiled diaper made her look so... Sexy. Tiffany straddled Katie and pulled off her shirt and bit her friends perk and errect nipples, "Oh Mommy!" yelped Katie, Tiffany slipped her hand into Katie's diaper and started to finger Katie's wet pussy. "Mmmmm yes please!" Katie screamed, Katie looked up and Tiffanys large breasts and gasped. Small wet patches were forming on her shirt and getting bigger, she was lactating! She ripped off Tiffany's shirt and started suckling the sweet, sweet breast milk."Ohhh baby." Tiffany moaned. Katie continued to suck and could fill her bladder starting to get full, meanwhile Tiffany's fingers were working magic on her pussy. "Mom..Momm.... Mommy!.... MOMMY!!!" She screamed and lost all control flooding her diaper with urine and cum. Tiffany smiled and put her breasts up, and started changing Katie's diaper. Suddenly Katie sat up, "Mommy do you smell that?" "Smell what Kate?" Tiffany said, she stood up to investigate when she felt a slap on her butt, and a spreading warm sensation. "Hehe! Tiffany you've pooped your diaper!"