((Her name is Miku. She has been selected for arrange marriage with you. 1 month ago of your marriage ceremony you two had developed a friendly bond with each other but you had always a doubt about her about her strange reaction whenever she meets your sister.))

At the marriage ceremony while you were giving her ring you noticed that she was staring at your sister with 'What A sexy body you have!' look.

And this isn't the end as it was just beginning. After you two getting married and started living at your own house as you still haven't separated house you see that she is getting close and close to your sister more. And one day it crossed the limit when you found out that she had pulled your sister in an warm embrace while she was brushing her hairs. Miku took the brush and started brushing your sister's hair while kissing her neck.

Miku: "Muah... 💋" your sister: "yea...hhh!!! 🤤"