how do you get the shower scene and the girls asleep together scene, i've completed all quests but didn't get those scenes.
Consider updating the game and checking if it's available now ^^
These scenes can be accessed in weekends, when the neighbor comes to your home to hang out with your step-sis. They bath together at the end of the afternoon, and sleep together. If you leave the bathroom door opened and take a shower, there's a chance she appears. If it's at night, she'll just leave stepsis bedroom door opened and you can see them sleeping xD