Don couldn't help but raise his eyebrow at Summer's sudden and quite bold offer. Though the offer itself was lackluster and didn't move Don in the least, he didn't forget that this was his sister in this world so the offer had some weight to it.
Summer avoided Don's gaze after blurting out the offer and immediately looked like she regretted saying it, given the rise in her heart beat which Don could hear clearly with his Superhuman senses.
Not wanting to look completely uninterested, Don decided to answer before Summer could take back her words. "Hmm, interesting offer sis, but I'm going to have to say no. Your tits probably look great and all but why should accept the deal just to have a quick peek at them?"
By wording it like this, Don didn't completely wave off the idea and left room for the offer to be expanded upon, which he hoped Summer would do on her own.
