Seeing the history and theology of celibacy in such strong terms as he does, Iwonder if he and his wife are, by mutual agreement, living in continence?
Sex really isn't the issue. It's all the stuff that comes with sex - wife, kids, mortgage, teenagers, etc.
Once married, it would be ridiculous to live as brother and sister, imo, if they have all the other trappings of marriage. I really don't think that God intends for any man in his situation to throw his wife under the bus. :( The church let him enter as a married man - he needs to stay married.