You will be lucky to see parents at all. iCarly there are no parents. The main character lives with her older brother who is more a perpetual 18 year old. Another show Victorious the parents of the main character are also a no show. Both are shows on Nickelodeon.
You are correct about Nickelodeon. The cheap Canadian import Degrassi is a major offender. There is more seedy sex on there than in most soaps aimed at adult women.