Would the Catholic Church excommunicate parents who are otherwise faithful, over only their being credo baptists?

Can a woman whose husband is a credo-baptist believer still go to mass with her husband and family? If they want to delay baptism of their children until they are capable of thinking for themselves will you get kicked out of the Catholic church? They are both Catholics; the husband just feels that baptism is something a person has to decide for him/herself to do. The parents do want their kids baptized; they just want them to choose to do so (when they are mature enough to decide).