The problem of having a royal boss can also be solved (in a much more sniveling fashion) via an alliance with the ruler. Given it's the Middle Ages, forging a marriage bond is a sure bet. Securing the hand of a king, prince or princess is no mean feat, however. Finding a hook with the ruler is the best option. No matter what the player does, however, it would be folly for them to dream of winning the non-matrilineally bound hand of a sovereign queen. It's not going to happen.
Of course, you can use the same exploit to force other rulers to do other things you want, like sending you marriage requests that are convenient for you (for instance, matrilineal marriages for your daughters), swear fealty as your vassals, surrender during a war, and generally execute plays in your favor.
-> Rulers in equal realms try to arrange matrilineal marriages for all women of their dynasty.-> Rulers in female dominated realms try to arrange matrilineal marriages for men, unless they are important heirs.-> Rulers in male dominated realms try to arrange matrilineal marriages for women only if they are important heirs.-> The vanilla matrilineal marriage game rule is ignored. 1e1e36bf2d