How is Dr. Strange’s relationship with Clea?

I am getting into Dr. Strange and I found out that he is married to a woman named Clea. Clea was born in the Dark Dimension and she is the niece of Dormammu which means Dormammu is Strange’s uncle-in-law. And Clea is also in the MCU in the Multiverse of Madness post-credit scene played by Charlize Theron. How is their relationship currently in the comics and why isn’t this relationship more well-known? The marvel wiki doesn’t say that they are divorced or estranged so what’s going on between them? Is the marriage real or a political marriage for a random storyline?