Eventually, the villain decided that he was going to be lazy today. He'd earned it after all the hard work he'd put in, what with kidnapping trillions of women and making them all his loyal, obedient, eternally young sex slaves. And of course, there was all the work he'd put in building this universe and stealing planets for it, and BUILDING planets for it. (Harder than it sounds! Especially if you're trying to maintain enough mortality to enjoy all your women.)
Finishing off his drink and setting down the cup on the nearby bed table, he smirked as he looked over the two sleeping monstergirls in bed with him. He pulled the blanket off of Cerea's fat, horsey rump, grinning. He thrust his fingers into her pussy, which was still wet with arousal and from having his cum pumped into it recently. The centaur moaned blissfully, squirming as a smile came to her face...
At which point a loud, blaring siren filled the room. Rachnee and Cerea were startled awake, looking around in a panic, Rachnee covering her ears in annoyance. "What the hell is that?"
The villain stared into space. He added that alarm on a whim, but he never thought he'd ever have to use it... "Intruder alert..." he said softly.
Rachnee blinked. "Wait, what?!"
Cerea looked worried. "Master, I thought your realm was unassailable..."
"So did I..." the villain said. The two women in bed looked worried, and started to stand up. The villain gestured, creating a viewing portal into his AI hub.
He'd captured several versions of famous AIs in addition to his other conquests, giving them female bodies for when he wanted to fuck them, although he'd organized the strongest into the Prime Controllers of his universal computer system. A Mother Brain, a GLaDOS, a Skynet, a SHODAN, a HAL9000, and an AM ruled over the Hub, coordinating with their lesser counterparts. "Why is the alarm going off?" the villain demanded.
The AIs all traded nervous looks. "Sir," said Skynet, projecting a hologram of a female version of the villain from its monitor. "I... I can hardly believe it, considering how tightly woven the borders of this universe are, but we have confirmed intruders! Someone has broken into your realm unannounced!"
"HOW!?" Rachnee said, shocked.
"We don't know," Mother Brain said, her bottle bubbling.
"Somehow they were able to subvert the barriers on this reality," AM said. "We have located them, though."
"Where are they and how many are there?" the villain demanded.