ERDM-135 - Intense kissing with sister-in-law and 4 hours of illicit sexual activity

Spent the night at my brother's house, and my brother was away, leaving me alone with my sister-in-law. Attempted to seduce my sister-in-law and engage in incest, having a secret sexual encounter with her through intense kissing. My sister-in-law, overwhelmed by increasingly aggressive advances, succumbed to her desires and engaged in sexual activity.