For Broadway producer Martin Richards, how New Jersey’s high court defines “spouse” will determine whether he gets a bigger slice of the fortune left by John Seward Johnson Sr., the son of the founder of Johnson & Johnson.

The Supreme Court, during three hours of argument on Tuesday, was asked to determine Johnson’s mind-set in 1961 when, with the aid of a young in-house J&J attorney, he drafted one of several trusts he created during his lifetime to benefit four children, 11 grandchildren and their “spouses.”