(a) If a person dies leaving a surviving spouse and a child or children, the surviving spouse shall be endowed of the third part of all the lands for life whereof his or her spouse was seized, of an estate of inheritance, at any time during the marriage, unless the endowment shall have been relinquished in legal form.
(b) A person shall have a dower or curtesy right in lands sold in the lifetime of his or her spouse without consent of the spouse in legal form against all creditors of the estate.