Tim let out a long sigh and looked down at my sister with a big grin on his face.
"Geez, that was way different from just using my hands," he said shamelessly. He sounded really satisfied. His cock was still half hard and shiny with cum and saliva.
Sophia was sitting on her heels, breathing heavily through her mouth. Her chest was rising and falling fast, making her big breasts move up and down. She had swallowed all of his cum without saying anything. The room felt quiet except for the sound of everyone breathing.
Tim kept staring at her for a while. Then he spoke again. "Open your mouth. Show me you swallowed properly."
Sophia fixed her position and kneeled up a little straighter. She opened her mouth wide and stuck her tongue out. She did it in a lewd way, holding her mouth open so Tim could see inside clearly. There was nothing left. She had swallowed everything.
Tim grinned when he saw that. He looked at his cock and then back at her. "Good. Now clean my cock."
Sophia moved right away like she didn't want to make him wait. She reached up with one hand and held his cock. Then she leaned forward and took the whole thing into her mouth.
Since it wasn't completely hard, she could fit all of it easily. She started moving her head back and forth, sucking on it to clean off the mess. Her lips slid along the shaft as she worked. She was doing it properly, making sure to clean every part.
After sucking for a bit, she pulled her mouth off and used her tongue instead. She licked all around the head and down the sides, sliding her tongue slowly to get everything clean. Tim stood there with his hands on his hips, looking down at her while she worked. He seemed to like the feeling of her tongue moving on him.
Sophia didn't stop at just the cock. She moved her head lower and started licking his balls too. I saw her pause for a second and take a small sniff, her eyes closing for a moment like she was smelling him. Then she stuck her tongue out again and started licking his balls clean. She moved her tongue around them carefully, making sure she got every spot.
Once she finished with his balls, she took his cock back into her mouth again. She bobbed her head a few more times. All the licking and sucking must have felt good because his cock started getting hard inside her mouth. Sophia's eyes opened wide when she felt it growing thicker on her tongue. She quickly pulled her mouth off and looked at it. His cock was getting fully hard again right in front of her face.
She kept licking and cleaning until she was sure there was nothing left. Then she sat back on her heels and looked up at Tim. His cock bobbed a little when it left her mouth. Tim looked down at her with a satisfied look.
"Wow, you're really good at cleaning cocks," he said.
Sophia didn't say anything back. She just stayed on her knees, waiting to see what he wanted next.
Tim stretched his arms a little and then spoke again. "Get up. I want to do one more thing."
Sophia looked confused but stood up slowly. As she got to her feet, she glanced back at me. She noticed right away that my cock was hard and pushing against my pants. She quickly looked away and turned back to Tim.
Tim pointed at the bed. "Lie down on the bed."
Sophia climbed onto the bed without arguing. She lay down on her back in the middle of it. Her heavy breasts spread out a little to the sides because of their size. They rose and fell with her breathing. A few small drops of milk were still leaking from her nipples and running down the curves of her breasts. Her thick thighs stayed pressed together and her arms rested at her sides. She looked very exposed lying there like that.
Tim climbed onto the bed right after her. He sat down on her stomach, just below her chest. His hard cock was pointing straight up. Sophia looked up at him from below, still breathing a little fast.
Tim reached down with both hands and grabbed her breasts. He started squeezing and kneading them roughly with his fingers. Even though he used both hands, he couldn't hold all of her tits. They were too big and kept spilling out between his fingers. He massaged them hard, pushing them together and then letting them fall back.
"Hehe… what's with your titties? Why are they so big?" he asked while he kept groping them.
Sophia's face turned red. She bit her lower lip and tried to stay quiet while he played with her chest.
"Answer me," Tim said in a firmer tone. "Why are your titties so much bigger than my mom's?"
He started flicking her nipples hard with his fingers. He pinched and flicked them without stopping. Sophia let out a small gasp and her body twitched under him.
"I… hah… I don't know," she said, her voice shaky.
Tim kept attacking her nipples. "Really?"
He continued flicking and pinching them hard, focusing on her weak spots. Sophia squirmed under him, her thick thighs pressing together tighter. Her heavy breasts jiggled every time he flicked her nipples. More milk started leaking out and running down the sides of her tits.
"Maybe… maybe because I have milk in them," she finally said, biting her own lips.
Tim's eyes lit up. He kept kneading her breasts roughly while he spoke. "You have this much milk in them?"
Sophia nodded, still biting her lip. Her face was bright red.
Tim giggled and squeezed her tits harder, making even more milk flow out from her nipples. "Wow, that's so much milk… hehe… are you a cow?"
He kept playing with her breasts, kneading them and flicking her nipples at the same time. Milk kept leaking out and dripping down her soft skin. Sophia's breasts jiggled heavily with every movement of his hands.
He looked at her face again and asked, "Can you make a sound like a cow?"
Sophia's face turned even redder. She looked embarrassed and uncomfortable. "Tim… I can't."
Tim frowned. He looked unhappy with her answer. He stopped moving his hands for a second. Then, without any warning, he raised his hand and smacked one of her tits hard. The sound was loud and sharp. Her breast jiggled and bounced heavily from the slap. Milk flew off her nipple from the force. It took both me and Sophia by surprise. She yelped loudly and quickly put both hands over her tits to cover them.
To be continued...
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