 I don't need words written for me, not even the Torah, and you don't either. Keep an internal Judaism. God will meet you inside, just beyond where you speak to yourself. Talk of Christianity while you breathe Judaism. Your son will know the difference, and when he is old enough to keep secrets, you shall tell him of the bride that is the Sabbath, who has been waiting inside impatiently all through his childhood, and you shall celebrate their wedding together.