Oh boy does she. She actually poisons her at one point, but mainly she gets on her nerves by reminding miorjah she exists and used to be with fenris. Miorjah hates the idea of fenris ever being with anyone else, and when she learns that Fenris might have bastard sons that starts a big fight. They’re not actually his sons, but he can’t prove it otherwise until later in the story when they have children.