Getting pregnant on the sly... yes or no?
My thoughts are DO NOT DO THIS. If you have an agreement that you are in charge of birth control then there's a certain level of trust that you assume responsibility for. Without trust then you have issues.
My thoughts were it takes two yes's to try for a baby. One no means no. You shouldn't expect your partner to agree to parenthood, whether it's the first baby or not, if they don't want that.