I know this may not be what you want to hear but his concern for his wife is inspiring. NRE, or New Relationship Energy, is kind of like the Never land of relationships..everything is new and exciting; there is a child like oblivious joy that fills the experience. Most new Lovers experience this and it is wonderful accept for the idea of it ending.
You should be happy that he loves his wife in a way that gives him the strength to pull back from something as powerful as NRE. He is probably taking care of her needs to make sure they are both healthy. That ability is a possible testimony that he will be a caring lover to you as well as your relationship grows.
Be patient...consider the health of everyone.
There's my two cents