'You said you were aroused talking about... you know. It had the same effect on me.'

She kept looking at my cock.

Without breaking her gaze, she asked.

'Does that mean you were aroused thinking about... about me?'

I had to lie.

'No, I was thinking about Mom and the sex we had.'

'Oh, that makes sense.'

She sounded dejected.

She continued to stare at my erection.

'So Dad, can I... yeah I, do an experiment?'

I can't imagine what she was thinking about.

'Sure. What is it?'

'I'd like to take a rough measurement.'

'OK, measurement of what?'

She was embarrassed to say.

'Go ahead baby. Tell me. It...