true if you think of it that way Yen did start her betrayal but she didn't finish it, Francesca finished it. I wish Yen had changed her mind sooner the moment she met Ciri and reunited with Geralt, but they wanted to create more drama. Honestly I don't like a lot of the writing in S2, most notably what they did with Yen's character and killing Eskel so soon, even though I do think it was still better than S1 was.

I hope S3 will be more faithful to the books and Geralt and Yen work out their problems, because it really makes me sad seeing them at odds with each other and Geralt not being able to forgive her yet. As the audience it's easier for me to forgive Yen especially after she proved herself and sacrificed herself to save Ciri. But if I were Geralt I wouldn't be able to forgive Yen so soon and easily either, it's going to take more time for him to forgive and rebuild that bond they have. I think S3 will probably be mostly focused on the family dynamic between them and Ciri, and trying to protect her from the world, so hopefully we will get a lot more scenes with Geralt & Yen in S3.