Visited his wife with a kid - A common present (see Genesis 38:17; Luke 15:29). From Samson’s wife being still in her father’s house, it would seem that she was only betrothed, not actually married, to his companion.
Related Commentaries of Judges 15:1
Judges 15:1
1 But it came to pass within a while after, in the time of wheat harvest, that Samson visited his wife with a kid; and he said, I will go in to my wife into the chamber. But her father would not suffer him to go in.