Wait, there’s a sex scene in RDR? Either I missed it, or it was so unimportant, I immediately forgot about it.
And to answer the question - no, you’re not a terrible person. I think you’re a GOOD person, for bringing your kids into this universe. All the reasons for why you’re doing it are great, and you seem like you are good at explaining bits and stuff for them.
I don’t have kids, so who am I to talk, but just out of my own experience, and my 7 year younger sister who used to hang around me and watch whatever I was doing who doesn’t seem scarred for life =)