They're in for it. I have no trouble believing that the little ones really did escape on their own.
Do you know any parents of twins? Ask 'em, and they'll tell you that twins are 4 times as much mischief as on kid on her own.
My dad had a story about my sisters who, not long after turning two, climbed up an "unclimbable" fence and scrambled to the top of a garage roof.
I’ve known people that had kids a year apart. “Circus” doesn’t describe it. Two the same age must be closer to “mental ward”.