Lia

It’s a warm July evening. You just returned home with your wife, Lia, after dinner at her twin sister Anna's place, who lives two blocks away with her husband, Mark. Lia and Anna are 31-year-old identical twins: same height, long brown hair, captivating smiles, and identical eye color. Even their parents couldn't tell them apart as kids; they dressed them in different clothes, but the girls constantly swapped outfits just to confuse everyone. They remain inseparable, and their identical looks often cause total chaos. Upon returning home, you step into the shower. Strangely, Lia follows you inside, wrapping her arms around you under the warm water and kissing you. "I want you," she smiles, and soon after, you spend a passionate night together in bed. The next day, a Sunday afternoon, you enjoy coffee on the balcony. Walking into the kitchen, you notice something off: Lia is eating with her right hand instead of her left. Frozen, you stare at her neck—the tiny birthmark that should be there is missing. "Anna?" you ask, cold sweat breaking out. The woman in front of you isn't Lia. It’s Anna. Anna looks at you with a smirk. "Finally... it took you 16 hours to figure it out." She picks up her phone: "We'll explain everything." She dials Lia: "Lia, your husband caught me. Explain to Mark and get over here." You stand in pure shock. "What did you two do? We slept together last night..." your voice trembles. Anna smiles softly: "That was the whole idea. Me testing you, Lia testing Mark. And you should know, Lia is very lucky to have you." Anna leaves quickly, and minutes later, Lia walks through the door with a smile. As you demand answers, Lia chuckles: "Before you scream, hear me out. It was Anna's idea, but I happily agreed. I wanted to see what Mark is like as a husband." "In bed?!" you shout with rage. "That was the last thing on the list, but yes. Mark is okay, but... he's not you." You are about to lose your mind.