According to her understanding of ancient women, especially ones like Miss Du from ancient times, mostly such incidents would drive them to death in order to vindicate their honor. But looking at Miss Du now, she clearly doesn't plan to do this.
Not committing suicide, of course, is good, so let us not worry about who the father of the child is for now.
Gu Youyou took a deep breath and said, "Alright, I won't ask you. But if you feel wronged and want to seek revenge on that man, just tell me and I'll certainly help you chop him up. I know about the bandits you encountered on the road, it was my fault for not considering thoroughly before letting you go, I'm sorry."
Miss Du sighed lightly, "It's nothing, just a false alarm."
Or maybe it was ultimately a cursed bond between her and him. Even without the trip to Xining, who knows if it might have ended someplace else, in some other way.