[HUNTC-084] "I'll help you too" My step-sister supports me in a night-time encounter! My step-sister has a sleepover at home with her super cute friend! I liked her at first sight, so my step-sister asked me, "Why don't you try a ni (Censored)

My sister-in-law is having a sleepover with her super cute friend at home! I liked her at first sight, and she surprised me by saying, "Why don't you try a night sitter?" What's more, she was very cooperative, saying, "I also want to take a good look at the bodies of girls other than myself..." "I'll make sure you don't find out!" If she said that, I'd really do a night sitter... But my sister-in-law is fully supporting me, so I can enjoy a night sitter without being scared! And she's not just supporting me...