Yes (reluctantly)

Miss Williams appeared to consider for a minute, glanced nervously to her left and then moved round, so that Ben had to turn 90 degrees to see her.

"Okay," Miss Williams said, "I guess it will be alright."

She began to slowly unbutton her lab coat.

"Wait a minute," Ben said, "why did you move?"

"Um... so that the camera would get a better view of your... of your performance."

"You're lying," commented Ben, "if anything the camera has a worse view of me."

"Will you just be quiet and wank your cock, or our experiment will be void!" cried Miss Williams in exasperation.

Ben began sliding his hand up and down his shaft and indicated that Miss Williams should continue her strip. As she slowly released each button, a little more of her cleavage began to be revealed. Ben's cock began to grow hard again.

Then as he looked over Miss Williams shoulder at the large mirror on the wall behind her, he suddenly realised why she had moved.

"We're being watched aren't we?" said Ben, as Miss Williams moved to unhook the final button on her lab coat.

"I don't know what you mean," Miss Williams responded, pausing in her actions.

"That mirror. There are people behind it aren't there?"

"Yes, there are observers," she replied, "it is standard practice for experiments to be verified by other colleagues. Now will you please keep your mind on your task."

"You haven't undone your last button yet," Ben reminded her. "So, are there many people watching us?"

Miss Williams didn't answer straight away, but bent to unhook the final button. When she straightened up, her lab coat fell away revealing a flimsy lace bra that barely seemed capable of holding those impressive breasts in place. Below this, she wore matching panties, with stockings and a garter belt. Ben felt his prick twitch with lust.

"There were perhaps two or three colleagues watching at first," commented Miss Williams, matter of factly, "but when you ejaculated for the third time, I imagine they were joined by a number of others."

"Men or women?"

"Women mainly."

"Cool!"

"Would you please keep your mind on the job?" Miss Williams admonished him.

"Would you please take off your bra?" Ben reminded her.

Miss Williams unhooked her bra at the front and it fell away, with her lab coat. Her big titties tumbled out and Ben pumped his cock hard. Then suddenly he looked alarmed.

"Glass!" he yelled quickly.

Miss Williams stood transfixed for a minute. Then realising what he was saying, she rushed forward, her big beautiful tits bouncing before her. She grabbed a sample jar from the corner of the table and dropped to her knees before Ben.

But it was too late. A thick glob of sticky white sperm shot out of the tip of Ben's shaft and splattered over the pretty blonde's big wobbly tits. It was quickly followed by another stream of spunk, then another. Everytime Ben's cock twitched, it released yet more of its precious cargo. Miss Williams was beside herself with rage.

"You stupid man! You have ruined the experiment!" She cried.

"How's that?" Ben asked, "you seem to have caught it all. Can't you just scrape it off your tits?"

Miss Williams said nothing, but sullenly began to do precisely that.

When she had recovered all of it, she asked:

"So, were those five a fluke or have you got some more in you?"

"Oh, there's plenty more where that came from," Ben replied, "but I may need some help."

"What sort of help?"

"Well my cock can manage some more, but my right hand is cramping up badly. I don't think it could go another round."