Anata ga Tanetsuke Shita no wa Ai Suru Tsuma Desu ka? ~Sukebe na Futago no Ane ga Kodane o Motomete Koshi o Furu~

My wife, Shino, greets me warmly whenever I return home.
We've grown accustomed to married life, and she's started talking about wanting to have children.
When I excitedly expressed my desire for both of us, Shino smiled shyly but with joy.
So that night, I must have done it with my beloved wife.
There's no way I'd have done it with my sister-in-law, who happened to be visiting.
"You're way too early, trying to tell us apart..."