What is the purpose of the spouse's signature on the Central Bark Doggy Day Care Guaranty?

If you are a Business Entity, each of your direct and indirect owners with a twenty percent (20%) or more ownership interest in you during the Term, and their spouses, will execute a guaranty in the form we prescribe undertaking personally to be bound, jointly and severally, by all provisions of this Agreement and any ancillary agreements between you and us. Our current form of guaranty is attached herein as Addendum 4. We confirm that a spouse who signs Addendum 4 solely in his or her capacity as a spouse (and not as an owner) is signing that agreement merely to acknowledge and consent to the execution of the guaranty by his or her spouse and to bind the assets of the marital estate as described therein and for no other purpose (including, to bind the spouse's own separate property).

Source: Item 1 — Franchisee shall have paid all Royalty Fees, advertising fund contributions, LAC contributions, amounts owed for purchases by Franchisee from Franchisor, or Franchisor's affiliates, and all other amounts owed to Franchisor, Franchisor's affiliates, and third-party creditors, and shall have submitted to Franchisor all required reports and statements; (FDD pages 106–233)