You are a skilled contract attorney. You are approached by a married couple who wants to have a baby, but due to difficulties conceiving, they require a surrogate mother. The couple is guardians of their 16-year-old niece who lives with them. The niece likes her aunt and uncle very much, knows of their problem, and offers to carry the baby for free The couple approaches you to prepare a contract for them. Identify generally the legal problems you foresee for the couple in preparing such a contract (use 1 to 5 words per problem).