Why not?

Deciding that she was ready, Samantha urged Karl to continue with his plan.

"I want you to go for it, but please be gentle with me."

"Don't worry, babe. I'll go slowly", he replied. Karl started to apply pressure to her tight pucker. His cock head flared as it was stimulated by the resistance. "You have to relax, babe, or I won't be able to enter you." Samantha started to shift uncomfortably. Despite the extra lubrication, Samantha was still a little apprehensive. Brent, who had missed out on the action for a few minutes now, had an idea.

"Sam, look at me." She focussed her attention on Brent. He leant forward and drove her into a deep, passionate kiss. Samantha shuddered at the romanticism, and started to relax her limbs. Her shoulders became less squared, and she let out a deep moan as she locked tongues with Brent. They finally broke their erotic union.

"Yes... much... better." Samantha finally loosened up enough for Karl to slip his cockhead past her unsuspecting hole. It went in with a slapping sound, due to the high amount of moisture down there. A little of Karl's precum oozed out from the side. Samantha gasped instantly, and Karl started to breathe hard. Brent smiled, gaining satisfaction that he had come up with the solution that worked. He decided to pay Samantha's silken folds some deserved attention.