A healthy competition

“That’s fine, Adam,” Katherine smiled beatifically for a moment before she glanced at their mother and wrinkled her nose in disgust. “Mom, what the hell are you doing in Adam’s room?”

Said mother was face-down, ass-up on Adam’s twin-sized bed, completely naked and with her son’s penis still in her pussy.

“Don’t blame Mom for being a little out of it, Kathy,” Adam felt his shaft re-harden within his mother’s thoroughly fucked pussy and eased out of her with an audible ‘blop.’ Adam smirked when he saw his thick white cum dribble from his mother’s wet folds. “It’s my fault for fucking her too hard. Please forgive me for that and for touching Mom’s naked body while you're here.”

Katherine rolled her eyes at him. “I guess I can forgive her if you’re the reason she’s naked in your room right now. You two were really loud, by the way. What gives?”

“Oh, just a little mother-son bonding,” Adam shrugged and grabbed a handful of his mother’s creamy thick ass, massaging it openly for his older sister to see. “Nothing to be too concerned about, really.”

“Uh-huh,” Katherine gave him a doubting look before she smiled and leaned forward, presenting Adam with a deep view of her ample cleavage. “Say, how about we go to my room and you can have another good look at my you-know-whats?”

“You want me to look at your tits again?”

“Shhh! Not in front of Mom!” Katherine looked far more embarrassed than angry.

“Relax, Kathy. Mom’s totally fine with you showing me your tits, right Mom?” Adam gave his mother’s ass a pinch.

“Adam!” Katherine clenched her fists and glared at Adam menacingly. Or at least she tried to. The sight of Katherine’s large braless mammaries straining the material of her t-shirt made it difficult for Adam to take her seriously.

“Sorry, Kathy,” he said.

Katherine smiled warmly. “I forgive you.”

Sarah stirred. “Mhm. Whuh?” she murmured into his bed.

Adam reached an arm under his mother’s limp body and lifted her so that her back was pressed against his chest. He pinched one of her nipples. “Mom, wake up, please.”

“Mhmm, okay, honey,” Sarah’s voice was faint. She gazed back at him with adoring, submissive blue eyes. “What can Mommy to do for you?”

Adam considered her words for a moment and spoke. “Kathy wants to show me her breasts right now, but she’s afraid of how you’ll react. Tell her it’s okay.”

“Adam!”

“Katherine, relax,” Sarah’s voice was firm, a far-cry from the submissive woman who had let her son violate her mere moments before. “If Adam wants to see your breasts, you should show him right now. I really don’t mind.”

“What?!” Katherine’s azure eyes were wide. “Mom, you can’t be serious!”

“Don’t talk back to me, young lady,” Sarah’s voice brook no argument. Adam’s manhood grew hard and he began to rub it against his mother’s back as he openly palmed her massive breasts.

“B-but!” Katherine stammered. Adam wished he had a camera so he could take a picture of her stunned, disbelieving face. Seeing his older sister at a loss for words was a something he never thought he’d witness and it helped him recover fully from the earlier romp with his mother.

Adam licked his mother’s right ear and whispered. “Tell Kathy to show me her tits.”

“Katherine,” Sarah’s voice grew cold. “I’m your mother and if I tell you to show your younger brother your breasts in front of me, you’ll do it.”

Katherine gulped, looking very much at that moment like a girl ten years her junior.

“A-alright, Mom,” she gave their mother a defeated look before she hooked her arms under her blouse and pulled it over head. Her big breasts spilled free.

“Wow, sis. I really love looking at your tits,” Adam openly ogled his older sister’s naked breasts.

Katherine smiled reflexively and bit her lip. “I-I love it when you look at them, Adam.” She pushed her breasts together and tweaked her nipples, stretching them lewdly. “Here, look at my breasts, little bro.”

A particularly perverted thought crossed Adam’s mind. He smiled.

“The two of you are my relatives.”

Katherine cringed, but kept massaging her breasts. “Oh, not this again. Seriously, what is it with you and saying weird things today?”

“Let your brother talk, Katherine.” That was Sarah. Adam rewarded her by pinching one of her nipples. She gasped and leaned into him.

“And both of you have large breasts, right?”

Both women hummed in agreement.

“So that must mean you both have a compulsion to compete over whose breasts are better and I'm the only one who can decide once and for all who has the best breasts."

Adam’s mother and sister stilled. Adam groped his mother’s big breasts while he waited for his newest alteration to solidify itself fully in their minds.

“Ah…” Sarah moaned and turned to face her son. She cupped her massive mammaries. “You’re right, honey. Your sister and I have large tits so we constantly bicker over whose breasts are better. Too bad for Katherine, it was never much of a competition.”

“Shut up, Mom!” Katherine crawled onto the bed and positioned herself next to Sarah. “Adam, you told me earlier that you love looking at my tits.” She pushed her huge jugs into Adam’s face, blocking his view of their mother. “So you must think my breasts are much better than that old hag’s, right?”

“Adam…” Sarah positioned herself behind Adam and whispered in his ear. “Wouldn’t you rather have a more experienced woman show you her tits than some girl who doesn’t know how to please you however you want? I bet you think about Mommy’s breasts all the time.”

Adam felt his mother's soft, pillowy titflesh surround his head.

Katherine glared at Sarah and moved close enough to Adam so that her nipples almost touched his face.

“Too bad my tits are the ones Adam always asks to see. They’re big, soft, and have absolutely no sag. Adam would rather feel his big sister’s tits than his mother’s," she looked at Adam and smirked triumphantly. “Go ahead, Adam. Feel them.”