Tyrion Lannister: If we marry them, they could rule together.

Varys: She’s his aunt.

Tyrion Lannister: That never stopped a Targaryen before.

Varys: No, but Jon grew up in Winterfell. Is marrying your aunt common in the North? You know our queen better than I do. Do you think she wants to share the throne? She does not like to have her authority questioned.

From Game of Thrones – Season 8 Episode 4: ‘The Last Of The Starks’ (8×04)