Your husband is getting high off texting with a child. Every new text is another high. This is completely inappropriate. Furthermore, what if they mess up in a moment of spectacularly bad judgment and something physical does occur? It wouldn't be on the girl, obviously--she is a child. I don't know VA law but here, prison sentences are very harsh for adults of either sex who have sex with kids. You might remind him of that, since he seems to think there is just absolutely nothing wrong with what he is doing.