Bea and Don were very close, even having portraits of each other in their chambers.
Although unlikely that they were involved physically, they were in constant communication, both by letter and by thinkagram. Bea treasured their conversations, and drew enormous comfort from Don when it appeared that her daughter Cruz had either been croaked or turned by Gobwin Knob.
It was Don to whom Bea chose to write one last letter in her final moments.
Her death affected King Don very deeply. The Volcano Uncroaking convinced King Don that Gobwin Knob was a threat. But it was Queen Bea's sacrifice that caused King Don to become a fervent supporter of Royalism, even to the point of destroying the loyalty of his side.