Maybe it's a Mexican thing.

[Jaime wraps one arm around Ken, companionably squeezing him to his own side, and likely putting the poor kid off-balance. But hey, you have to wrap your arm around someone else's shoulders when you're telling them an old story! It's big brother law!]

My sister's so much younger than me that I remember exactly what it's like to be an only child, and trust me -- she was just as scary then as she is now.