He just keeps sucking, he honestly would not mind if he did at all what so ever.
He thought the whimpering was so cute so he decided to reach up and play with his nips as he went a ton faster and deeper.
He looked up at him too see him as such a moaning mess, he got even more erect.
He smirked and went even faster helping him out with it.
-yup, totally do- you actually did super great!-
"Mph!~"
He slowed down the pace and stopped after and got up, panting with his mouth opening showing he has it in his mouth.