Missouri Revised Statutes Title XXX. Domestic Relations § 451.290. Wife deemed femme sole, when

A married woman shall be deemed a femme sole so far as to enable her to carry on and transact business on her own account, to contract and be contracted with, to sue and be sued, and to enforce and have enforced against her property such judgments as may be rendered for or against her, and may sue and be sued at law or in equity, with or without her husband being joined as a party; provided, a married woman may invoke all exemption and homestead laws now or hereafter in force for the protection of personal and real property owned by the head of a family, except in cases where the husband has claimed such exemption and homestead rights for the protection of his own property.