Kiki lubes you up!

"You will have to sit me up again," you mention.
"OK, honey," Gemma confirms as she squeezes your shoulder.
They both heft your tits so you can sit again. Next, Kiki gets in front of you with a smile on her face. Her fat cock is poking your right nipple. You feel wetness.
"Come on, then, I have a large object to stick up my butt," you chasten her after she rubs her cock around your boobs for a few minutes. She smiles wider. You grab at her cock but it slips from your hand due to it's wetness.
"Stop screwing around," Gemma orders.
"These are great," Kiki tells you. "I could fondle them all day."
"You will get to, but first, my butt."
"OK, fine," Kiki surrenders. She pushes her cock head between your boobs, then climbs on the bed in front of you. As she gets closer, her cock aligns vertically with your chest until the head pops out under your chin. She squeezes your mountainous mounds together.
"Ready," you tell her.
"Here we go!" Kiki starts pushing up until her crotch presses into the bottom of your tits, then pulls back as far as she can. "The pressure is great," she informs everyone. You smile proudly. She starts slowly, but soon picks up the pace. It takes a lot of **** to get their mass rocking. Her crotch is soon slapping the bottoms of your tits vigorously. Your breasts start to feel warm, and you notice their weight on your legs increasing, not quickly, but noticeably.
"They are growing, Kiki," you tell her. "I can feel their weight on my legs!"
"Here, allow me." Kiki slides as close to you as possible, then one at a time, lifts your tits so they rest on her lap. "Better?"
"Much, thanks."
From this angle, she bumps into your chin at the first thrust, leaving a dollop of wetness. As she picks up the pace, you arch your back and angle your mouth down to catch the head there instead. You also notice your boobs start bouncing off of her legs. The increased motion causes them to feel even warmer, and you start to notice them visibly swelling. The others notice too.
"Do you want Kiki to stop? She is overstimulating your milk glands. The growth formula should have time to leave your system before you get this vigorous," Gemma explains over the smacking sounds of your tits.
"Is it dangerous?"
"Well, if you let them get too large, the slightest stimulation will cause them to start leaking, and--"
"So, if you don't mind being a cow, no," Judy interrupts.
You can't feel their weight, but a quick visual inspection shows them at least 25% larger.
"You close, Kiki?"
"Getting there," she huffs.
"Oh, that's a strange feeling," you comment.
"What is?" Judy asks.
"His breasts are lactating! Kiki!" Gemma looks alarmed.
"Oh stop, he doesn't mind."
"So what? My boobs are leaking milk. That's what boobs do."
"Not supposed to unless you are pregnant!" Judy chimes in.
"This really isn't normal, even for our transformation process. I was trying to warn you," Gemma tells you.
You look down, and see your breasts are half again as large as before you started. No way Kiki can last much longer with these.
"Oh, well then, they were already huge to start, anyways." You hear squishing sounds from behind you. "Judy, you sound lubed up already!"