I can't possibly imagine why Kaya would want to suggest to anyone that James has a big cock. And it would be rather awkward for you to receive that from your cousin, no matter how many times she's seen you naked. In the public bathrooms.
Though of course you're correct in who wins.
Well, it could be. Well no, the actual present isn't. But this evening, after dinner, unless you have other plans, we should retire to your room. Partially in case you need reassuring on my opinion of your cock, of course. I'd hate for you to think there we were all so biased.