Deny everything.

‘What? No, that’s,’ John began, thankfully not struggling to show discomfort. ‘You’re my little sister. That’s messed up.’

‘Oh. Really,’ Louise mocked, making no actual attempts to cover herself up. ‘You weren’t looking at me?’

{first _name} followed her eyes, where she was examining just how much of her skin had been revealed. He quickly averted them from the sliver of thigh that was visible between her underwear and the blanket. ‘Louise, I wasn’t… I wouldn’t. You’re my little sister. Please, I need a favour.’

Louise pouted, as if she had reason to be disappointed, and pulled the blanket back up past her waist. ‘Whatever, John. So, what the hell are you doing in here, asking me for favours at the crack of dawn?’