Aaron can't watch any more

From Torg Adventure

The sight of Lashu's groin thrusting into his wife and her ecstatic cries had Aaron extremely horny. He could not watch any more; he had to act. Remembering his anatomy lesson from Lashu, he approached the alien from behind. Its ass was low, and Aaron knelt between its legs. He reached around and groped the alien's lower set of tits, causing Lashu to swivel its head around to look at him.

"Oh, I love your species. So inventive," Lashu said without slowing its pummeling of Phyllis' cunt. Aaron directed his cock toward Lashu's lower opening until he could feel the slick flesh of the entrance. He slowly rocked back and forth in time with the ambassador's thrusts. He had trouble keeping inserted until he began thrusting in when Lashu was pulling back. Aaron shifted his grip to his wife's tits, rolling and pinching her nipples firmly. The sensations, sounds, and images of Aaron fucking Lashu fucking Phyllis were incredible, and Aaron could hardly contain himself; he groaned and urged, saying, "Oh, Lashu. Your lower opening is so tight! Fuck my wife hard! I want to hear her cum on your beautiful cock."

The motion of their three bodies made it seem to Aaron that he was fucking Phyllis through Lashu. The alien's rear entrance was much more like a cunt than an asshole, though it was pretty tight. Lashu's static got really loud and then switched to the warbling that Aaron associated with getting close to orgasm.

Lashu's turned again to look at Aaron and said in a close approximation to a sultry voice, "I never told you, Aaron. I'm a Leska!"

What happens next?