But... Are They F@#king?

So I'm watching some show that's got Alison Krauss and Robert Plant talking about that album they did together and the interviewer is asking her what it's like to sing with a rock god and asking him what he thinks of Alison's bluegrass background and how many records they think they'll make together and blah blah blah, possibly something else about hair cream and/or trumpets. I listened for about an hour, but never heard the answer to the question I most wanted answered: Are they fucking? Because even though she's, like, 28 and he's somewhere north of 65, I'm certain that they have. I mean, he's Robert Fucking Plant. Isn't that the price of admission?