No biggie, if you don't think the show is suitable for your kids, just don't let them watch it. To be honest i don't think the show is for kids, 15 or younger.
I'm sure all the JMs here are old enough to decide what's considered enjoyable for themselves. They wouldn't become a bad person just because they heard a song with 老母 in it.
PS: my dad called his mom/my grandma 老母. I never call my mom 老母.
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