Betty

Betty was the assistant to Edith, Haytham Kenway's nursemaid. She was in a relationship with Edward Kenway's valet, Jack Digweed.

In 1735, after Edward and Edith were murdered by mercenaries, Haytham left for Europe with Reginald Birch to locate his kidnapped half-sister Jenny, so Digweed found an alternative employer for her.

Digweed soon fled when he was suspected of letting the mercenaries into the Kenway's manor, but he kept in contact with Betty. In 1747, Haytham realized Digweed and Betty were lovers, and followed her to her new address after she attended Tessa Kenway's funeral. There, he threatened her into revealing what she knew about the man who blackmailed Digweed.

Afterwards, Betty sent a letter to warn Digweed, but Haytham intercepted her letter, informing him of his location in Germany.

Reference

 * Assassin's Creed: Forsaken