Plutarch, Pompey
Bernadotte Perrin, Ed.

9. So then, when Sulla had made himself master of Italy and had been proclaimed dictator, he sought to reward the rest of his officers and generals by making them rich and advancing them to office and gratifying without reserve or stint their several requests; but since he admired Pompey for his high qualities and thought him a great help in his administration of affairs, he was anxious to attach him to himself by some sort of a marriage alliance. [2] His wife Metella shared his wishes, and together they persuaded Pompey to divorce Antistia and marry Aemilia, the step-daughter of Sulla, whom Metella had borne to Scaurus, and who was living with a husband already and was with child by him at this time.¹

This marriage was therefore characteristic of a tyranny, and befitted the needs of Sulla rather than the nature and habits of Pompey, Aemilia being given to him in marriage when she was with child by another man, [3] and Antistia being driven away from him in dishonour, and in piteous plight too, since she had lately been deprived of her father because of her husband (for Antistius had been killed in the senate-house² because he was thought to be a partisan of Sulla for Pompey's sake), and her mother, on beholding these indignities, had taken her own life. This calamity was added to the tragedy of that second marriage, and it was not the only one, indeed, since Aemilia had scarcely entered Pompey's house before she succumbed to the pains of childbirth.