A light beam came out of the equipment, striking Brett for just a moment. He jerked, and then lunged forward, tackling Liz, but then somehow twisting to hit first and break her fall.
"S... sorry!" he stammered. "That thing made me..."
He stopped because Liz was giggling uncontrollably. She put her arms around him.
"Oh, man, I haven't ever been literally tackled to the ground before!" She sounded really happy. "Anyway, stop apologizing and get started. I don't think I'll like it if that thing tries forcing you again."
"But.."
She grabbed his head and pulled him in for a kiss, then said, "I already know why you're doing it, so you don't have to apologize. I'd like if you tried to enjoy it too. It would suck, thinking some guy screwed me and didn't enjoy it." Then she started kissing again.
Brett couldn't proceed, however. Then, another light beam hit him, and he was speaking in the weird voice again. "Initiating procreation for subject." He rolled Liz onto her back and entered her without hesisitation.
"Woah! Ah...." she gasped at the sudden invasion. She'd had dildos in her this big, but never an actual guy. He hammered away at her for at least a dozen strokes, then the light turned off and he stopped and stared down at her, mortified at what his body had just done.
Liz was a little mad now, but not about his intrusion. "Keep going, dammit! Don't stop now!"
He tentatively started working, and she smiled at him. "This is your first time, ain't it?"
Embarrassed, he nodded.
"Well, longer and smoother, okay? and try to meet me when I push up against you. yeah, there you go... It's fine, okay? I swear I'm liking it. Wow, with a cock that size, I'm lovin' it. Oh, yeah." She arched her back against him, rubbing her tits against his chest, then said, "Oh, yeah, this is not the last time I'm riding this hotrod, dude. You oughta train up real nice!"