When he had set the brands on fire, he let them go into the standing grain of the Philistines, and burnt up both the shocks and the standing grain, and also the olive groves.
The fate that Samson’s "wife" sought to avoid by betraying him overtook her after all (cf. Judges 14:15). The Philistines presumably burned the house down with the woman and her parents inside (Judges 15:6). The Philistines’ act of revenge on his "wife" simply added more fuel to the desire for revenge that was already burning within Samson (Judges 15:7). Evidently he loved the Timnite woman. He proceeded to avenge her death by killing many more of the Philistines (Judges 15:8). Then he took refuge in a cave nearby.