Saul said, I will give her to him, that she may be a snare to him, and that the hand of the Philistines may be against him. Therefore Saul said to David, You shall this day be my son-in-law a second time.
Of course, he was not aware of the fact that God had chosen David to be the king, and that God had anointed David to be king over Israel. So it is interesting that immediately he began to suspicion the fact that the kingdom was in jeopardy. "What does he want more than this, the kingdom?"