"You can cum three more times, right" , the narrator says. He's referring to the fact that a woman can have sex with her husband three times before he returns home, and she can't do it without her husband's knowledge. She's made to do it three times by her brother-in-law, and now she's going to have sex three times with nozomu, the man who's supposed to take care of her when her husband returns home. Okay, now we're back to the action. The narrator is all "wham, wham, let's do cum together" . And he's not kidding. The woman is freaking out, and the man is all, "shhh, whaddya suck it up?" . Then the woman's husband comes home and they have sex again, and then she has sex again. And then the woman has sex with the man she just had sex with, and it's all over again