"Oh, are there gifts involved, too? What makes a good Christmas gift?"
He was trying very hard to keep his own excitement tamped down. She'd just said that they would spend 'Christmas Eve' together alone. Alone. Leto knew he was being foolish. The ... Oswin... whatever she... it.. was, she wasn't human, and she wouldn't ever be. He couldn't expect anything of her.
Then, he thought, considering the Golden Path and the future of his own impossible love life, he realized that all he'd ever expected anyway from any love interest was good companionship and a modicum of caring. Oswin had that.
"When is Christmas Eve and Christmas, then?" he finally asked. "How long do we have to get all this together?"