Board Thread:General Discussion/@comment-4010415-20140421154105/@comment-25399914-20141116212139

DiegoAnime3000 wrote: We also have to take in note that all we know about this is from Yang's POV. Taiyang could know the reason why Raven left but refuses to reveal that to her daughter. After all, Yang doesn't even know the name of her own mother so she's probably in the dark about everything.

That includes the reasons and circumstances of their marriage and how they got separated. She doesn't say the name of her mother but that doesn't mean she doesn't know it.