My Big Stepsister Acts Like A Bitch In Front Of My Big Brother, But The Truth Is That She's My Tsundere Lover And We Have A Lovely Life Together Meguri

兄の前では冷たいお義姉さんと実はセフレのツンデレ同居生活 めぐり

For some reason, she's always cold to me—my beautiful, big-breasted sister-in-law Meguri, whom I find a bit hard to deal with. One day, while I was watching an adult video, she suddenly barged into my room (sweat). And for some reason, she didn't leave and ended up watching it with me! That night, she came to my room saying, 'Take responsibility for keeping me awake' (blush), and we crossed the line, starting a secret friends-with-benefits relationship! Is her tsundere attitude when we're around family just to avoid her husband finding out? Or is it just her hiding her embarrassment? A completely subjective, forbidden relationship of non-stop sex! An incestuous cohabitation with a sister-in-law who can't be honest!