Okay, I'll take a bath with you

You answered yes to your sister, who gives a big smile of happiness and satisfaction.

"Great little brother, come here!" She invited. "Come to the water."

Shyly you went. As the tub was large, you stayed a little far away from her, but your sister made sure to get closer. She hugged you from behind and you felt the softness of her big breasts. Your cock is hard and you hope she doesn't notice. Maribel chuckles and rubs your ass and your face turns even redder.

"Your butt is still smooth as baby," she said with some tenderness.

"Stop it..." You asked shyly. Maribel moved her hands and magically brought her liquid soap close. She spilled a little over her body. After that she began to stroke her chest, spreading the soap and then down your back. Her breasts rubbed involuntarily against your back, your cock throbbing so hard he seemed to want to escape your hands.

"Okay, now sit on the edge so I can wash your front," said Mirabel. Your face was burning so red.

"W... what? W... what do you mean my front?" You stammered.

"Your wee wee. Oh yes! I forgot it's not to call it that. Sorry little brother. Come on!"

"T... that's fine! I... I can wash it myself."

"Nope, how boring! You said you agreed to shower with me yourself, it can't be an incomplete experience!" She pulled you to the edge of the tub and made you sit there, as if you were still a child. After that you still remained covering your penis. "Get it out of the way," she said pulling your hands and revealing your hard little dick. Mirabel gave a smile that seemed to be pleased, her eyes seemed to glow. "How cute! It's like you've stopped in time, yours is like a little boy yet! What a cute little thing!" You would blame her, but before that she touched your cock taking your concentration and started lathering it. You looked at her hands rubbing your cock and then at her slightly moving breasts. "Warren aren't your hairs born yet?" She asked smiling at you and you, embarrassed, shook your head no. She seemed pleased with that. "It is so cute!" She lowered your foreskin, revealing your pink glans. "That's cute! You have to wash down here, you hear, little brother?" She started rubbing it head, lathering her up and you can't resist giving a moan. "Is that a good little brother?"

"Y... yes" you moan.

"He's already pretty hard, isn't he?"

"Y... yep..."

"He's cute, even hard." She then ran her hands over your testicles. "Even the balls are pretty much the same as when you were younger."

"S... stop saying that, Mirabel."

"Excuse me..." She laughed and still looked amazed. "Now that I've seen him, I think it can still be called wee wee, isn't it?"

"Sister..."

"That's not a bad thing! Look, bro, because you were nice to me today, I'll make you feel even better." She brushed her hair out of her breasts and revealed her pink, already hard nipples. "Usually boys like my breasts. And you little brother? Do you like them?" You obviously nodded and she smiled at you. "Good boy!" She then wrapped your entire cock with her hand and began to slide it up and down, the soap helping to slide better. "Look Warren, I can practically hide him entirely with my hand, hihi." She then started moving faster and you couldn't stand it much longer, spilled all your milk on her breasts. "Uuu, how much milk! It's even more incredible considering your little balls. That wasn't like when we were younger, right, little brother?"

"Yeah ... yeah ..." you answered still panting