Needless to say, he didn't sleep in her bed

We were on our way to have dinner with friends, after which Em was going to remain behind to have a sleepover.

N (age 7): Emmy, I think maybe I'll sleep in your bed tonight.
Em (age 10): Why?
Me: Sometimes during the summer, when you're in New York, N sleeps in your bed so that he doesn't miss you so much.
Em: Awww. Are you going to miss me tonight?
N: Yep. I think I'll want to sleep in your bed so that I don't miss you so much. I'll feel like you're here with me.
Em: That's so sweet! Of COURSE you can sleep in my bed if you want.
N: So I will. But I'm not going to wear any underwear.

Silence.

Em: Um.....Mom?
Me: Amazing how quickly that conversation went from sweet to creepy, isn't it?
Em: You're tellin' me!