No

You move your ass a few times and then stop. You don't want to make him angry, besides so far he's not really demanding, that's a small price to pay, you can always refuse him later.

"Is it...is it pleasurable for you?" he asks.

"To be honest I'm barely feeling your touch, you can grab them harder" he obeys and you feel sting of pain "but not that hard!"

"Sorry he says "I just never..."

"Did it before" you end it for him "I know. Listen, Jack. Girls generally don't want you to be aggressive, but they want you to take initiative, so you have to be firm and decisive, but also delicate and considerate."

"But that's a contradiction!" he whines.

You sigh. You really want to curse at him, but you decide not to, you just need to be patient.

"Not necessary" you answer "you just need to read the signs, to know when to be firm and when to be delicate. From tomorrow we should do our lessons in more organized fashion, but today we'll stick to this breasts thing."

You take his hands away and then put them back on your breasts. He's like a robot, he behaves like he's afraid to grab them harder.

"You have to get a stronger grip" you instruct him "stronger, stronger, ok, that's enough. Now you can squeeze them a little, very good."

This is kinda fun to be honest. The thought that you are teaching your adult brother about girls is so absurd that right now you aren't even mad at him.

"Now, move them a little, massage my breasts."

He obeys and it seems that you are pretty effective teacher, because it's starting to feel good. You have to stop this, because it's possible that something unexpected will happen.

"Enough for today" you say. You see that he is a little disappointed, but he doesn't protest.