my sister about the difficulties

A friend once complained to my sister about the difficulties contained in child rearing, especially the lack of peace and quite rest.

"What you need is a playpen to separate the kids from yourself," my sister suggested.

So my sister's friend bought a playpen. A few days later, my sister called to ask how things were going.

"Superb! I can't believe it," she replied. "I get in the pen with a good book and the kids don't bother me one bit!"