Xmas Spouse Swap

Separated at the age of sixteen by selfish battling parents going through a bitter divorce, twin sisters Iris and Siri Beaulieu vow to never be apart on Christmas Eve, which is also their birthday. Now grown and married and perhaps a bit bored with their husbands, the twins decide to give each other the ultimate birthday present by switching identities. And one tipsy Christmas Eve leads to a twin swap the husbands will never forget.
Although it's been done, many times, many ways. Merry Christmas to you!