
Monogamy, when it comes to Miqo'te, is always the exception to the rule. Outside the tribes and clans, it's an option, and it's one that typically leans towards Miqo'te that were born in the cities rather than the typical environments.
You're not really breaking the lore as much as you are, say, opting out of the cultural status quo.
You're not really breaking the lore as much as you are, say, opting out of the cultural status quo.