Yes, but not by another

As Chris' dexterous muscle pulsated and pumped Steve's engorged member, his desires only grew. The urge to be filled up entirely was so alluring, so mind-bendingly strong, that it felt as though it would break him to not have it fulfilled. So powerful was it, that it started to spill over and into reality itself.

Focused as they both were on the intense pleasure that came from Chris' blowjob, neither of them noticed a change going on in Steve.

From above his tailbone, a lump was forming. Unencumbered by pants, it grew, longer and longer with every lustful stroke of Chris' tongue. Soon, the fleshy appendage had grown long enough to touch the floor, and Steve jolted at the sudden sensation of cold tiles against the sensitive tip of his new limb. He pulled his eyes away from Chris for a moment, just enough to see the pink, mushroom-tipped tail curl around his ankles, continuing to grow longer.

By the way Chris' breaths had gotten heavier, he'd seen it too. He somehow managed to speak with the cock still shoved down his throat. "I... I need that thing in my pussy! Now!"

Steve didn't even know he had it in him. One moment, he was staring at the still-growing, four foot limb, and the next minute it was curling around Chris' thighs and into his sopping pussy. Then, his senses were being assaulted from two directions, as the hypersensitive cock-tail started lancing in and out of the tight, silky walls. Chris moaned, both in pain and pleasure, as he felt his vagina christened by the only slightly smaller dick, which seemed to have stopped growing as it pushed against his cervix. Each time, it pushed further and further in, until it broke through and speared his most inner parts. His back arched, lust shooting through him, and redoubled his efforts to please Steve back, tongue slobbering over every glorious inch of his huge dick, thrusting his hips back against his muscular tail.

The increased intensity seemed to pay off, as Steve's grip suddenly tightened on Chris' head, shoving it down hard onto his cock as a guttural roar tore through him. Both of his dicks swelled as the monumental loads rushed through their lengths and came spurting out into Chris' waiting holes. Chris milked every drop, cramming as much as he could inside him, until, with the combined mass of his stuffed belly and womb, he looked at least four months pregnant. With triplets.

Steve extracted his softening cocks from Chris' holes and collapsed back against the wall, noting the sensations it sent through his tail. "Holy shit," he whispered. "I don't know what the hell that was, but it was incredible."

Chris just gurgled happily on the floor.

Just as they were coming down from their high, there came a knock at the door.

"What goin' on in there? Chris, ye alright?"

Steve looked down at them both, half-naked, Chris out of action for as long as it took to digest that much cum, and him hardly even human anymore. He quickly stuttered out an answer. "Y-yes, we're both fine, thanks!"

There was an audible frown. "I dunnae want t' hear it from you, lad. If the lass tells me herself, I'll leave ye alone."

Chris then decided it would be a great time to groan loudly, as if he were in pain.

"I don't like the sound of that. Ye got three seconds to explain or get away from the door before I break it down."

Despite Steve's protests, May just kept counting down.

"Three."

"Two."

"One."

May burst into the room, then stopped dead in her tracks at the sight that was unfolding.