[ Hm, a tough question. Should she continue to give him the satisfaction or to ask something of him? Wondering that for a few seconds, Illya finally answers with the brightest grin. She'll give him what he wants, sure. But it comes with a rather hefty price.

Shirou should be willing to pay it, though. It's not like he would have much of a choice in the matter, if he's so desperate. ]

Then... Shirou has to kiss me, [ Hey, he asked for it, as her warm breath trickles against his ear, Illya slowly running a finger down his side. ] And refer to me as his older sister. If you can do that, then... I can give you what you want, onii-chan.

[ At the very least, he should be happy that he's being rewarded for doing a good deed, how nice of her! ]