Matthew McConaughey’s mother, Ma Mac (played by Holland Taylor), is the first to discover—and to reveal—the possibility that Matthew and Woody might actually be brothers. She accidentally lets the family in on the secret early in the series, setting off the chain of events that pushes Woody to pursue the truth.
Sources: In “Brothers,” Matthew’s mother reveals a long-buried secret that the two friends might be biological siblings. Woody then turns the ranch upside down investigating it, while Matthew grapples with how this might impact his personal and public life.
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