Oooops

The young Swedish au pair had been working for the Schmitt's for more than a year. While hardworking and efficient, she still struggled with English.
One day, she told Mrs. Schmitt that she had received good news from her boyfriend Sven. "He is coming to visit me from army next week!"
"That's wonderful," the woman replied. "How long is his furlough?"
"Oh," the young woman said, blushing, "About as long as Mr. Schmitt's. Just a little thicker."