Being totally frank is as much Mycroft's area as it is Irene's. He offers an obviously false smile with a side expression of 'Ha ha, aren't you clever,' and says, "Apparently not as well as it is you, although I can't say I'm surprised. Your profession is rather... portable, is it not?"

And in a place like Baedal, Mycroft knows that not only are there plenty of secrets to be found, but that a sex club will be one of the best places to find them. The number of politicians and other influential persons on Earth who have been laid low thanks to seduction is astronomical. He can't imagine this place being any different. Irene should thrive on it.