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Your thoughts went into a hyperdrive. The woman could be considered your step grandmother and step mother. If you lay with her and got her pregnant, then the child could be simultaneously your auntie or uncle, and your step sibling. But to Rikako, she would be the mother and at the same time the great-grandmother to that child. By that extension, you, as her mate, would become your own great grandfather.

It would be that way, if she was married to your grandfather and your father, and you would marry her, which you wouldn't do. "Your husband knew about the other two not being his?"

"It was his idea to do present me to your grandfather as a mistress to strengthen their business relationship. Eventually, I got pregnant with Kiyomi and the relationship became stronger."

"Kiyomi?"

"Your grandfather's daughter. Of course, she cannot inherit the Doe family name so I register her as an 'Aoki'. She's around your age, actually. Would you want it if I arrange for you to sleep with her? And by the way, here's her picture."

That offer was unexpected and very hardcore. "She looks like a model."

"She is. Here's another one."

You look at the two pictures and saw that despite her lack of bountiful assets, she is cute and beautiful. "You're really offering her to me?"

"If she gets pregnant, she'll most probably becomes your wife, even if it's in name only. Wouldn't her life becomes stable?"

"Doesn't she has a boyfriend or something?"

"Then you want to netorare, to cuckold her boyfriend? Kinky."