No, they're siblings. Come on.

‘No, no, nothing like that.’ He finally turned to Louise, who apparently was more curious, and slightly amused, than the disgust he’d expected. ‘She’s my sister. Louise.’

The doctor raised her eyebrows again, speechless for a moment. ‘Okay. That’s fine. Whatever you need to feel comfortable.’ She smiled and looked at Louise. ‘You’re both comfortable, aren’t you?’

John watched Louise’s face change from surprise to consideration to resolve in a few seconds, before she gave a small series of quick nods.

‘Great,’ Doctor Harper continued. ‘Well, if everyone’s comfortable, John, I’m going to ask you to take off your pants, so I can get a better look at what we’re dealing with here. Where exactly, down there, is this pain based?’