Ask Shinobu further

"How about you?" you ask.

Shinobu raises her eyebrows. "How about me?"

"Do you enjoy getting role-playing being inseminated by someone apart from your husband?" you ask.

Shinobu doesn't answer the question but from the her body move, it's a 'yes'. Your own body reaction tells you that it would enjoy that as well. However, she doesn't move from her position and it's up to you to take the initiative. "Rikako,"

"Yes Naruto?"

"Please undress your intruding neighbor,"

Rikako gets up, go behind Shinobu and pulled the yukata, revealing the left breast; the latter doesn't even move as this is being done on her. You hungrily eat the sight of the naked breast and soon found yourself sucking on it, eliciting a moan from Shinobu who is still being held by Rikako. As you continue to do so, you untangle the obi that is tying the yukata together and soon the clothing is off her upper body, revealing the other breast which you immediately attack with your mouth.

"Rikako," you instruct, moving your head to signal what to do next.

Rikako nods and adjusts her sitting into a seiza position, placing her knees on the floor and resting her buttock on top of her feet. She then put the semi-naked Shinob's head on her lap.

"What are you doing?" Shinobu asks, clearly bewildered.

"Why, I'm going to impregnate you of course," you say, getting into the heat of things. You spread her legs apart and to your delight, she is quite wet. She's ready. You position your penis at her entrance and enters in a single thrust.

"Ahn..." the woman moans.

"You really enjoy getting fucked by someone other than your husband, don't you?"

Shinobu moans again, this time louder.

"I bet you enjoy thinking about what will happen next. You want me to fuck the two of you, risking getting pregnant while your husbands pretends that they're being helpless to stop it."

"Un..."

"Do you and Hisae takes any contraceptive?" you ask as you keep up thrusting inside her.

"I take the morning after... Hisae's probably too stupid."

"Oh? You're being clever and Hisae's being stupid. What if it's the other way around. Maybe Hisae takes a better one without you knowing?"

"Shinobu," Rikako interrupts, "Maybe your husband purposely gives you the wrong concoction?"

"NO!" Shinobu denies. "He wouldn't!"

"Yet, you deny strongly, as if he's the type to do it. Right now, you fuck Naruto, being confident that nothing will happen from this. But you're wrong. Your husband wants you to get pregnant with Naruto's bastard. You also want to risk it as well, don't you? Despite knowing very well your husband isn't to be trusted in this matter, you still let him get you the medicine even though you should do it yourself."

Instead of Rikako's words repulsing Shinobu, they drives her to the edge as Shinobu lets out a really loud groan of pleasure while her legs locks behind your back, triggering your own orgasm as well. Without hesitation, you shoot your seed inside her married vagina, the risk of getting her pregnant with your child turning you on.