You have to educate your kids to love metal
Having a taste for metal is not incompatible with having a young family. You have to teach the little ones to appreciate it - gradually. What you do is find out what shit they're obliged to say they like as a result of peer pressure at school, then plot a route to steer them away.
For example, when my daughter was little at the turn of the century, she was obliged to "like" the Spice Girls. So over time I bought her CDs by girl bands with an increasingly rougher edge (and better songs). I think we started with B*Witched, then Pink, and so on. As she entered her tweens we moved her on to Linkin Park, then Korn, and she took over from that point.
For my son, it was easier. I started with easy-listening stuff such as Queen, then AC/DC, and then took him to a Wolfmother concert, after which he was away on his own journey.
Best wishes to my friends on the Reg, BTW.