Greg nodded. "The law's bullshit. And, frankly, it's none of Shawn's business what you decide to do anymore. Between you and I, I still question his ability to make the most rational of decisions, every now and again. And something like sex-" He shrugged, taking another drink, "You've obviously thought about it. And the fact that you're scared shows you're being rational about it. So whatever it is you do decide, is going to be right, no matter how large a shit-fit Shawn or anyone else deicdes to throw over it." A beat, "But, look at it this way- he can't exactly throw a shit-fit over something he knows nothing about. The only people who have to know, are you and this 21-year-old of yours,"
Look at this, House giving reasonable advice. Something was obviously afoot with him- then again, she might not know him well enough to catch it. But at least she might get use out of his newfound wisdom