Check them all.

William glanced over at the others, but they were more interested in the cupcakes than what William was doing. Still, he should make sure the dose was sufficient for all of them before going too far.

"You should eat more cupcakes, Cassidy," he told her. "If you gain a few pounds, your boobs will get bigger, and that would be great!"

"That would be great!" Cassidy said, and headed back to the tray.

"I can tell you're having a great time, Hazel," he said, interrupting her conversation with his sister and noticing she hadn't gotten herself a drink yet.

"Yeah, I'm having a great time!" she agreed, grinning.

"You know what would make it the best party ever?" he asked. "If you got sloppy drunk!"

"That would be the best!" Hazel agreed.

"Morgan, help Hazel get drunk," he instructed.

"Of course!" Morgan said, handing her own glass to Hazel and then grabbing the pitcher of rum punch to refill as Hazel began to guzzle.

The twins were already well inclined to both eat cupcakes and drink, so William decided to try a more daring test.

"I'm so glad you like our cupcakes," he said.

"Yeah, they're really good," one twin commented.

Now that he was near them, he saw one had little golden apple earrings and the other had little golden maple leaves instead. Convenient!

"So, are your earrings the only way to tell you apart?" he asked.

Both twins rolled their eyes, making it clear they got tired of answering that question a long time ago.

"You clearly like each other a lot," he said. "Some people might think finding your identical twin pretty to be vain, but they're wrong. Just because you look alike doesn't mean you shouldn't find each other to be very attractive. I mean, it's just obvious. You both have a gorgeous sister."

"Well yeah!" said Autumn.

"It's obvious," Apple agreed.

"It's good that you're comfortable admitting how attractive you find each other," he said. "It's perfectly natural to be sexually attracted to your sister. Society might not understand it, but that shouldn't stop you. We're all friends here and we support you. You should kiss."

They stared at each other for several heartbeats and William began to worry he had gone too far, that his jism was too dilute in the frosting to overcome such a taboo.

But then the twins grabbed each other and started desperately sucking face as if they'd wanted to for years and were just waiting for permission. Maybe they had been. Maybe he had made them so.

"That's right, girls," he said. "There's nothing wrong with ****. It just makes it hotter."

Autumn moaned into Apple's mouth as her sister grabbed hold of her ass. William grinned. It was definitely time to push harder with all the guests.

He went back to were Cassidy was gobbling cupcakes and Hazel was guzzling **** with Morgan's help. He stepped behind Cassidy and grabbed hold of her tits from behind, something he'd imagined for years. She gasped and dropped her cupcake.

"It's okay, Cassidy," he whispered in her ear. "You like this. You like this a lot."

"I like this a lot!" she agreed, leaning back against his chest as he squeezed her fun bags.

"Your bruber's grabbin' Cassie's boobs!" Hazel told Morgan, pointing.

"It's okay, Hazel," he told the **** woman. "I grabbed Morgan's boobs earlier."

"Oh.... Okay then," she said.

Morgan beamed.

"Can I tell them now, William?" she begged.

"Sure, Sis," he agreed, slipping his hands up under Cassidy's sweater to play with her big tits through her bra, whispering assurances that having her tits fondled made her crazy horny.

"Everybody listen!" Morgan exclaimed, clapping loudly enough to get the attention of even the enamoured twins. "I wanted to let you all know that I fucked my brother this morning! I'm a slutty brother-fucker!"

Cassidy gasped, but William assured her she was fine with it and happy for Morgan.

"I'm so happy for you, Morgan," Cassidy exclaimed as the brother in question finally figured out how to unclasp her bra and slip it out of her sweater.

"There's nothing wrong with ****," Apple said, her hand between her sister's thighs.

"It just makes it hotter!" Autumn affirmed, and tweeked her twin's nipple.

"Oh my fushing gaw!" Hazel exclaimed, looking around in drunken bewilderment. "Wush wrong with you guys? Thas jus sick!"

"Now, now, Hazel," he chided. "We all have kinks. I'm sure you've done a few things you're embarrassed about. Tell me something dirty you've done that no one else know about."

The drunk girl flushed but immediately volunteered: "I massurbayed wif a cucumer!"

Morgan and Cassidy giggled. The twins had gone back to pawing at each other and didn't care.

"Well, you're just the dirtiest little slut here, aren't you Hazel?" he said.

"I'm the diryest drunken slut!" she confessed.

"I think you need to show my sister you don't think you're better than her," he said.

"Yeah, I needa show her," Hazel agreed.