Nick didn't know he and Trubel were related until the end of the series so he couldn't tell her anything. He only said they may be distantly related in season 3 but that wouldn't be any different from any distant human relative he had no idea existed. That was in response to Trubel asking if they could be related. Nick was more certain about her having a Grimm parent.
None of the Grimms were ashamed of their heritage. They all took pride in what they were and considered what they did of the utmost importance. Any reticence they had was more akin to a "heavy is the head that wears the crown" type of attitude.
None of the Grimms were ashamed of their heritage. They all took pride in what they were and considered what they did of the utmost importance. Any reticence they had was more akin to a "heavy is the head that wears the crown" type of attitude.