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Sometimes things Simone would say would make her mom very uncomfortable. For example:
We are sitting at the table and Simone is talking about some of her friends who have tattoos even though they aren't allowed to. They get their tattoos in places that are always covered, she says, so no one finds out about it.
At this point her brother pipes in, 'so then how do we know that you don't have tattoos?'
Simone gives him a look and says, 'you KNOW I don't have any tattoos!'
Me and my girlfriend look at each other, because obviously the implication is that he has seen evidence that she doesn't have tattoos, even in places that are supposed to be covered!
Her brother continues egging her on: 'I wouldn't know if you got one yesterday'.
The obvious implication is that he has seen her naked sometime before yesterday. I am curious and my girlfriend is very uncomfortable. (I have learned that kids don't always realize how easy it is for us to put two and two together.)
My girlfriend, very annoyed, cuts in and says, "well I know you don't have tattoos, and I will know as soon as you get one, so don't think about it". Simone agrees, "I know, my friends who got tattoos is because their parents never see them naked but you do so I couldn't get away with it even if I wanted to". Simone and her mom would often be in the bathroom getting ready together in the mornings, so this part was no surprise but I was still curious about what her brother had suggested with his comments. Other comments he had made here and there suggested some knowledge of her body, for example, he once teased her in front of us for having hair on her belly button to which she replied "I can't help it, I'm a hairy girl".

Another time, Simone tells us that she wants to an art project where she and her friends roll around naked in paint and then roll their bodies on big sheets of paper. Her mom gives her the dirtiest look, and Simone adds, 'of course we would wear body suits, we wouldn't be totally naked'.

In all these situations I had to pretend to share her mother's discomfort and couldn't pursue my curiosity.