It's interesting (and a little nauseating) to consider whether Chris has a taste for cheese pizza. He did once suggest two decidedly underaged MLP: FIM characters as a great shipping couple, and even enthused about art of them fingering each other, IIRC. And he also liked a Shadman drawing of an obviously pre-pubescent girl with pigtails in a crop top, with her chest being pointed at significantly by an unseen adult. Also, his fascination with Robee evolving into a still-underage teenage 'boy' sporting a massive hard-on and then blowing a giant load all over his sisters' bedroom carpet needs to be taken into account.
But no, I don't think that Chris is a kiddy-fiddler (then again, I never truly thought that he'd be into incest and look how that turned out). If there is some tiny shred of decency left in Chris, then maybe he considers sex with children somehow verboten (as, indeed, it should be) because children can't meaningfully consent to sex. Maybe that was a part of why he decided to boff Barb? 'Even if she doesn't consent,' reasoned Chris, 'she could do. Which is almost the same thing...'