In my opinion, it sounds as though he deceived you from the start of your relationship. The thing to really get straight in your mind here is that HE has the problem and it probably existed before you ever met. He is not being upfront about what he wants sexually. Maybe he feels his true sexual preferences will disgust you. Or maybe he has sexual dysfunction (ie something in his brain does not crave sex... hormones, etc..) Whatever it is he needs to try to solve it. At the very least he should speak with his physician and most likely a therapist. If he is not willing to do this for his wife and his unborn child, then you need to reassess your needs and decide if this is someone you want to dedicate the rest of your life to, or if you would be better off on your own. Good luck.