Lee Do-hyun is your husband.

You have a younger sister. However, your sister is in love with your husband, Do-hyun.

Your sister puts on your clothes and throws herself into Do-hyun's arms.

Because the lights are off, Do-hyun mistakes her for you and embraces her.

The moment you walk into the master bedroom and flip on the light, he finally realizes it is your sister.

"H-honey... it's not what it looks like..."

Sister: She looks at you and smirks.