Millicas was currently heading to his room when he heard some a sound. Someone was crying softly. He looked towards where the source of the sound and found it was in Rias room.

Millicas opened the door and sure enough he found Rias on her bed crying. He closed the door behind him and approached her.

Rias soon realized she wasn't alone and saw Millicas.

"Oh… Millicas, I didn't want you to me like this," Rias said while still lightly crying.

"Rias let me make you feel better. Let me take care of you."

"What do you…"

Rias was cut off by Millicas pressing his lips against hers. To say she was surprised at what her nephew was doing was a serious understatement.

But if felt good.

Rias gently kissed back, letting Millicas wrap her arms around her as he continued kissing. Rias yelped slightly when she felt the smaller boy climbing up onto her lap, and continuing to kiss her.

"Millicas, ahh… why are you doing this?" Rias asked, as Millicas moved his head down and kissed her neck.

"So you don't like it?" Millicas asked, lifting his head up. Rias blushed.

"N-no…" she stammered. "Keep going, please!"

Millicas smiled, and continued kissing his aunt. Millicas moved his hands down and gently groped Rias' ass, while simultaneously kissing her.
Rias moaned slightly, and pulled away. Millicas gently groaned in disappointment, but Rias lifted up her shirt, and threw it off, revealing her enormous breasts, as big as Grayfia's, which were clad in a sexy black and purple bra.

"Do you want these, Millicas?" Rias asked, looking at Millicas with lustful eyes.

"Oh, yeah I do!" Millicas said, his eyes widening at Rias' impressive bust. He reached behind Rias, unclipped her bra, and then threw it away, exposing her massive breasts to the young redhead.

"Please me, Millicas." Rias said. "Give it to me please."

"Yes, ma'am." The young redhead whispered, before beginning to fondle Rias' left breast. He lowered his mouth onto her right nipple and began sucking on it. Rias moaned loudly, throwing her head back.

"Oh~! Keep going, Millicas!" Millicas obliged, and fondled a bit more, as well as sucking some more, making Rias moan even louder.

"This feels so… good!" Rias shouted, moaning lustfully at the sensations caused by Milliacs. "I… Millicas… I want it!"

"You want what?" Millicas asked, smiling up at Rias. "What do you want, Rias?"

"I want… you… inside me!" Rias moaned.

"Please~!"

"As you wish."

Millicas pulled away from Rias and pulled down his pants, revealing his long and hard dick.

"Oh my Satan," Rias whispered. "It's so big!"

"Thank you," Millicas whispered back, as he gently pushed Rias down onto her bed and removed her pants as well, revealing her soaking wet pussy.

"It's all yours, Millicas." Rias whispered, blushing. Taking a hold of his cock, Millicas pressed it inside his aunt, connecting the two together. Rias moaned loudly, and locked her arms together around her nephew as he was inside her.

"Millicas, fuck me." She whispered. "Make me yours."

"I plan to." Millicas replied, pulling out slightly, and then thrusting back into Rias, making her moan loudly again.

Millicas then began to thrust, at a medium-speed rhythm, into Rias, not fast enough to make it uncomfortable for her, but fast enough for her to know that he was definitely there.

Rias was loving it, judging by how much she was writhing around underneath her nephew, as he fucked her.

"Oh, fuck Millicas! Keep going!" she yelled.

Millicas was enjoying fucking his aunt, an absolute hell of a load. Rias was definitely very hot, nearly as hot as his mother, but still amazingly hot in her own right. Her crimson hair, the same shade as his, was incredible, though he still loved the way his and his mother's hair clashed when he slept with her.

Complying with Rias' wishes, Millicas began to increase the speed of his thrusting, until he was literally pounding inside her, and had to grab onto her shoulders to keep himself balanced.

"I… Millicas, I'm-!" Rias screamed, at the top of her lungs, as her juices squirted all over Millicas' cock. Millicas silenced her with a searing kiss, as he came inside Rias as well.

Once the final shot of cum left Millicas, he pulled out of Rias (she had unlocked her arms) and flopped down beside her, panting slightly.

"Millicas…" Rias scooted towards him and kissed him on the lips. "What-"

"It doesn't matter." Millicas replied, kissing back.

"What matters is that we enjoyed it."

"I enjoyed it a lot," Rias said. "But-"

"But nothing." Millicas cut in, kissing her again. "I love you, Rias."

"I love you too, Millicas." Rias replied, lying her head on top of Millicas' chest, and falling asleep.

Before Millicas joined her falling asleep he thought about the women that Issei left behind and never pleased and decided that he would take over as harem king.