Renard wasn't happy that Adalind went to the royals and was working actively against him. Sean is a zauberbiest and would know not to trust anything Adalind gave him and be on guard around her, she couldn't use spell or potions on him like she would on anyone else. She took revenge on him the only way she had left, giving info and helping his brother.
Adalind was a villain in season 1 when Nick took her powers away. She's not going to think "It's ok I lost my powers, I deserved it." She was going to want revenge, that's how most bad guys work on tv. I just watched a movie yesterday were the bad guy was caught and rightfully incarcerated, he spent his time in jail arranging to terrorize the cop who put him in jail. Villains wanting revenge for getting caught/punished for their crimes is a very common plot in drama, I don't know how it's surprising that Adalind would act in the same way.
It's been a while since I've seen season 4 but did Elizabeth actually say Adalind tampered with the spell?
Edited to add, I was curious and had time so I watched the episode. Elizabeth didn't say Adalind altered the spell, she said she didn't know how Adalind did it because to do the she would have had to have lost her powers, have grimm's blood and got her powers back by the ritual she did. Elizabeth had no clue Nick took Adalind's powers away or that she did the ritual while pregnant.
Adalind was a villain in season 1 when Nick took her powers away. She's not going to think "It's ok I lost my powers, I deserved it." She was going to want revenge, that's how most bad guys work on tv. I just watched a movie yesterday were the bad guy was caught and rightfully incarcerated, he spent his time in jail arranging to terrorize the cop who put him in jail. Villains wanting revenge for getting caught/punished for their crimes is a very common plot in drama, I don't know how it's surprising that Adalind would act in the same way.
It's been a while since I've seen season 4 but did Elizabeth actually say Adalind tampered with the spell?
Edited to add, I was curious and had time so I watched the episode. Elizabeth didn't say Adalind altered the spell, she said she didn't know how Adalind did it because to do the she would have had to have lost her powers, have grimm's blood and got her powers back by the ritual she did. Elizabeth had no clue Nick took Adalind's powers away or that she did the ritual while pregnant.