Who made a condition of no public affection before she would agree to
be married?  

Clue: OA performance of a French Neo-Classical tragedy can be an
electrifying experience. It is built out of strong passions, of the surging
conflicts of strong wills which beat upon, fragment and destroy each other,
of the agony of a human need that cannot be reconciled with the dictates of
conscience or duty. But the energy is verbal rather than physical.¹

(We think the above quote is by the playwright Peter Arnott)  I think
it a Jean Racine tradedy - but which heroine said no public affection
before she would agree to be married? Is it Berenice?