Rudy squinted his eyes and said, "Stop trying to act strong. It's your first time, and that's why I am being extra careful. I consider the first experience to be memorable and I don't want to compromise anything during the first time."
Rebecca bit onto the tip of Rudy's snake and continued sucking.
Since Rudy said he didn't want to compromise by having bad moments during the first, she bit him so he could remember that as well.
It was Rebecca's first time, and she had no experience in such a thing, although she had the knowledge and knew what she was supposed to do.
Rudy was the one directing the whole process. He instructed her on what to do, and what not to do, and at what pace to go at.
Rebecca followed all his instructions perfectly. She slowly started to suck the tip of Rudy's dick.
Although it was her first time, she wasn't clumsy at it like the other girls. However, she wasn't the best either.