Ryan Condal can do anything, but if analyzing the authentic Aemond/Alicent relationship, we can see that this is the most trusting rapport union. Only Aemond feels all Alicent's pain, as he has been drowning in it at young age like her. Combining the book and the show we get a completely holistic and logically complete pattern of their relations.
He's 100% mommy's boy, much more than any of her childred, I assure book Alicent would suffer the most over his (and Helaena's) death. Aemond is reflection of all her most sublime qualities. Don't forget book Alicent was ambitious and Aemond is embodiment of these ambitions. Lost an eye & turning pain into revenge, rode the biggest dragon as a KID, strategically cunning for his 18-20y, seriously she wouldn't be proud of him?! I'm certain she'd have paid the highest price for his life. What was done between them in the show is derogatory.
Alicent didn't just respect Aemond - she relied on him in war. It's visible how they internally understand each other's condition, commonality in sanctity of duty makes them related both and with Cole in terms of tenets. In series he desperately needs her attention as main reputable figure that Viserys has never been. Her opinion had long been crucial and pivotal to him. Aemond is gentle inwardly and only mother could give him pacification. Apart from personality traits and mental constructions Aemond basically lives with attitude of a parent child, his attachment to mom and necessity for her approval is an innate type of attachment, reinforced by experience and circumstances.
To some extent he has a distorted knight's type - protecting mother's honor is a divisive matter of honor/debt, and Alicent tacitly felt he was her support, strength and pride, rage and revenge.
Aemond had fulfilled all of Alicent's expectations and if Condal had respected book even a little, we'd have seen a great king he never was. Perhaps they'd even have run political affairs together behind Aegon's back, but book Aegon immensely appreciated brother for his intelligence and efficiency, entrusting him with the most important tasks. The fact Aegon ordered brother's statue to be built says a lot about Aemond's character and political force, which was tossed about in the show.

















