'She'll' in the Bible

Then she said, “Here is my slave Bilhah. Go sleep with her, and she’ll bear children for me so that through her I too can build a family.”

“I’ll give her to him,” Saul thought. “She’ll be a trap for him, and the hand of the Philistines will be against him.” So Saul said to David a second time, “You can now be my son-in-law.”