She focus.

She has a little grin on her face as she looks at your {Penis_size} penis. Her tiny feminine hand moving up and down. She notices you tense and twitch a bit when she gets to a sensitive spot. That is when she reaches down with her other hand and grips your sensitive testicles causing you to thrust up into her hand when her thumb just massages that spot. Deep pleasure aches inside you. You feel your self let out a noticeable moan.

She takes her thumb and tickles your tip and uses your lube to help that message. You feel the crown of your penis get harder. You try to hold out. She won't let you get your breath.