No, Louise isn't getting away with it that easily.

'No, Louise.' John felt her grip loosen on his shaft with the stern refusal. 'No. We can't. The truth is, doctor, Louise and I...' Louise now released him, stepping back in fear of the announcement. 'We're siblings. She's my sister.'

The doctor's eyes widened with the revelation. 'Siblings?' she repeated after a moment, her eyes glazing over.

'Yes.' He looked at Louise, whose nervous face watched for the doctor's disapproval.