Biden called his wife "drop-dead gorgeous" and jokingly referred to his wife's Ph.D. as a "problem." He soon took some heat from people who said his remark was sexist.
But looking back, Jill Biden said she did not see what the fuss was about.
"Now what's so bad? I mean that wasn't so bad, really," she said. "Of all the things he could have said! I meant that wasn't so bad."
Biden said that while he did face some criticism for his impromptu remark, "There was an awful lot of men and women who were from neighborhoods we came from who went ... 'She is drop-dead gorgeous.'"
Valentine's Day Surprises
Jill Biden said that Valentines' Day is her favorite holiday, and she enjoys planning surprises for her husband and children.
Last year's surprise involved a decoration surprise for the vice president when he arrived at his new office in the White House's West Wing overlooking the driveway outside the Eisenhower Executive Office Building, which houses administration staff.
"There's these big windows that are probably 10, 12 feet high, and on almost every pane of glass, Jill had lipstick," he said.
Jill Biden quickly interrupted her husband to note that it was not, in fact, lipstick but poster paint.
"Is that what it was?" he asked. "It looked like, you usually do on my mirror lipstick. That's why I thought that was lipstick. ... And all in red were, you know, Jill loves Joe, and all these hearts and Valentines and ... it pleased me but it didn't surprise me."
They each have a surprise in store for the other this Valentine's Day, but their lips are sealed for now.
"Mine are seldom as good as hers," he said, "but lots of times they sparkle, you know, which helps."