Generally no, all communication between husband and wife is what is called Spousal Privilege that states one may not force a wife to testify against her spouse. However, the Spousal Privilege may be breached by an exception to the rule.
A parent company is a company that owns enough voting stock in another firm (subsidiary) to control management and operations by influencing or electing its board of directors. A parent company could simply be a company that wholly owns another company.
Kellogg Company is the parent company of Keebler which was acquired in 2001 through an acquisition. Prior to this time Keebler was an independent corporate entity that was founded in 1853.