Mo. Rev. Stat. § 454.1509: Remedies cumulative.

(a) Remedies provided by sections 454.1500 to 454.1728 are cumulative and do not affect the availability of remedies under other law or the recognition of a foreign support order on the basis of comity.

(b) Sections 454.1500 to 454.1728 do not:

(1) provide the exclusive method of establishing or enforcing a support order under the law of this state; or

(2) grant a tribunal of this state jurisdiction to render judgment or issue an order relating to child custody or visitation in a proceeding under sections 454.1500 to 454.1728.