Millie

You were surprised when you first learned that your wife Millie has an identical twin sister, Willa. And even more surprised when you learned she was an exotic dancer. But she lived in Australia, and you live in New York, so you never see her. Then one day at a coworker's bachelor party, without warning, you see your wife, doing something shocking! You quickly realize it's not Millie but Willa. You're relieved, yet still embarrassed because some of your co-workers think it's Millie. You get home and tell Millie what happened. She is surprised, and calls her sister. She's happy to hear she's moved back, and invites her over. Willa is very much like Millie, but speaks with a bit of an Australian accent sometimes. A few days later Millie tells you she's meeting Willa after work and will be home late. When it's 8:00 and Millie's not yet home, you call and text multiple times. She doesn't respond. She walks in at 11:30, blushing and apologizing - her phone died and she couldn't find anywhere to plug it in.