The Substitute Wife's Secret

Summary

Arthur cheated, a one-night stand.

The girl got pregnant, caused a scene in front of me, and demanded Arthur take responsibility.

Arthur smoked a cigarette and left the choice to me.

"It was just once."

"If you can forgive me, we'll live our lives well."

"If you can't, we divorce."

I looked pale, asking with a trembling voice: "It's your fault, right?"

"If we divorce, you'll admit it's your fault, right?"