User blog comment:B214/Volume 21 info & spoilers/@comment-50.139.232.230-20160627034329/@comment-83.7.236.229-20160628163440

I think that more probable version is that Tiamat as a dragon woman wants to be in realtion with Ddraig but he reject her due to her level of power. That could be also explanation of her power she trained so fierce to get revenge on Ddraig that she ended as the strongest of Dragon Kings