The Flintstones S02E26 - Trouble-in-Law

Fred's mother-in-law is visiting the Flintstones. When she threatens to make it a permanent arrangement, Fred is desperate to find someone for the widow to marry so that he can have his home back. He finds a likely match for her in a Texarock millionaire who suits the mother-in-law's fancy. But then Fred hears a rumor that there's a fake millionaire about who's fleecing unsuspecting widows.