You tell the truth and convince him

You walk downstairs to the kitchen and see your brother making breakfast. He wears thin t-shirt and shorts. You walk behind him and say:

"I need to talk with you about something important to me"

"OK, I'll listen." - he answers, continuing what he was doing.

You hesitate a bit and confess:

"I have a serious challenge. If I fail, I'm going to end up as someone's sex **** for a whole month. There is no way to cheat and negotiate with that."

"Fuck!" - your brother stops his job and turns to you. "How did you manage to get in such trouble? What can I do for you? What is the challenge, by the way?"

"I have to have sex with everyone I meet today."

"Damn..." - says he and goes silent for a while. "Does it mean I have to have sex to save you?"

"Yes, everyone. And... honestly... I want to have sex with you even without that challenge."

"I knew it!" - smiles he, unexpected to your thoughts. "That's why you peep when I'm in shower!"

He knew it? Damn, you should be more careful! He makes a step to you and touch your groin.

"Did you like what you've seen? Cause I tried my best to catch your fancy."

"Yes, I did. I jerked a lot, thinking of you bouncing on my dick..." - say you and kiss him.

He moans loudly - "Bounce? That's interesting! I was thinking of laying on my back."

You embrace him and slide your arm to his butt. He's without underwear, his butt is warm and soft and he moans again.

"OK, I'll ride you. But I want something in return," he winks.

"What's that?"

"I want you to eat my boy-pussy first. I want to be wet and soaked with your saliva. And then I want you to slide in me deep and easy!" He whispers.

Second later you raise him on kitchen table and pull down his shorts. His dick is already erect. You see that he's well shaved there, as you've known for a while thanks to your peeking sessions. He raises his legs up and aside and you see his pink, virgin hole.