Diapered by her sister

"Okay little Laurie, Vanessa's gonna diaper you!" Vanessa waved the diaper bag. Lauren felt menaced by the thing.

"Okay, you've had your fun." Lauren said, trying to back away. "But the joke's over."

"Oh, 'the joke' is just getting started." Vanessa laughed. "Besides, I heard you wet yourself at school."

Lauren's cheeks burned and she hung her head.

"It's true! Oh my god, I can't believe it!" Vanessa cackled. "Well, if you're having bathroom problems I gotta diaper you."

With that Vanessa pushed Lauren's shoulder gently. Lauren had backed against the couch. With the slight push she tipped backward over, falling prone on her back with her legs comically kicking.

With Lauren helpless on her back Vanessa acted quickly. She caught Lauren's kicking ankles and lifted them. Lauren squealed as her ass pointed straight in the air. Vanessa set the diaper under her backside then lowered Lauren onto it. Then she pulled baby powder from the bag and sprinkled a heavy dose on Lauren's crotch. Lauren's face was neon as she lay helpless while her sister diapered her! Making things even worse, Vanessa grabbed her knees and pulled them wide, totally revealing Lauren's clean shaven womanhood. Vanesa then pulled the diaper between her legs and velcroed the sides. Lauren could feel the hot, uncomfortable fabric smothering her lower half. She'd just been diapered by her sister!