She kept going, gently biting on it, she wondered if he would cum

He groans and moves his hand to the back of her head, not holding her but simply resting it as he begins to buck his hips, clearly getting close. "Yessssss...." He says, it coming out like a hiss.

She continued, she massaged her balls and even gave them a little pinch

That finally pushed him over the edge, he thrusts his hips forward and at the same time is unable to help himself from trying to push her head down on him as he starts shooting his cum into her mouth, "Ah, yes.... good girl....drink it all down...ah~" He says happily, clearly enjoying her mouth around him.

She drank it down, waiting for him to allow her to stop