User blog comment:Emilia Da'len/True love/@comment-2169119-20130611143753/@comment-124.184.168.223-20130611163848

After hearing about Rhaegar's death? I don't know. It's a possibility, but she struck me as too strong-willed to throw her life away, even after the death of her true love.

My bet (and this is pure speculation) is that she died in childbirth.