It will be wise not to bring children into the picture right now.Be careful and observe his behaviours. I am guessing having a child was his idea.Some of men who are very secretive about their sexual preferences and fantasies try to create an image with a wife and children. They don't want the world to know this side of them.. You need to see if you are ok with that.If you find ,he has tastes that don't align with yours, you may want to get away from this relationship. Situation may become complex, if there is a child.