I hesitate

I'm just about to shoo her out of the room, when she says, "Daddy?"

"Yes?"

"Can I ... Can I compare my dildo to your..." She gestures at my cock with her pink friend.

"You want to compare my penis to your dildo?"

Penny smiles at me.

"Ok, baby"

Penny smiles a big smile and lowers her dildo towards my crotch. She lines the big pink phallus up next to my cock. As she tries to line up the dildo just right she inadvertently brushes her fingers against my cock, it twitches. She giggles and glances up at me.

"Well, they look similar, but it looks like yours might be thicker." She wraps her fingers around they dildo and they don't quite meet. She takes her other hand and brings it up to my cock and slowly wraps her fingers around the base of my shaft. Her fingers don't quite reach. She looks up at me and smiles, "They're the same, but which do you think is longer?"