Sorry; not a wife but Sari's servant.
Sorry, YES a wife, and yes a wife BEFORE Abraham sired Ishmael.
Genesis 16:
3 And Sarai Abram’s wife took Hagar her maid the Egyptian, after Abram had dwelt ten years in the land of Canaan, and gave her to her husband Abram to be his wife. 4 ¶ And he went in unto Hagar, and she conceived: and when she saw that she had conceived, her mistress was despised in her eyes.