Originally, we were a family of four: my older sister, my younger sister, and my father, and even now that we're older, we still take baths together as a family. - Now, my father has remarried, and I have a new sister-in-law, sister-in-law, and mother-in-law, making us a family of seven! - Moreover, according to our family tradition, they also take a bath together! - ! - Of course, it doesn't matter if they refuse, but I guess they are trying their best to assimilate as quickly as possible. - Even so, it's dangerous! - I can't stop getting an erection! - !