If the man had slept with the widow without there having been any marriage contract, he need not pay any silver. I fund this point as a form of tolerance in mesopotamia in regards to unmarried sex....
And the pretense of consenting adults.
Their is a similar story in the bible.
When Judah saw her, he thought she was a prostitute, for she had covered her face. 16 Not realizing that she was his daughter-in-law, he went over to her by the roadside and said, “Come now, let me sleep with you.”
“And what will you give me to sleep with you?” she asked.
His daughter in law was a widow.
At that time, Judah left his brothers and went down to stay with a man of Adullam named Hirah. 2 There Judah met the daughter of a Canaanite man named Shua. He married her and made love to her; 3 she became pregnant and gave birth to a son, who was named Er. 4 She conceived again and gave birth to a son and named him Onan. 5 She gave birth to still another son and named him Shelah. It was at Kezib that she gave birth to him.
6 Judah got a wife for Er, his firstborn, and her name was Tamar. 7 But Er, Judah’s firstborn, was wicked in the Lord’s sight; so the Lord put him to death.
8 Then Judah said to Onan, “Sleep with your brother’s wife and fulfill your duty to her as a brother-in-law to raise up offspring for your brother.” 9 But Onan knew that the child would not be his; so whenever he slept with his brother’s wife, he spilled his semen on the ground to keep from providing offspring for his brother.
About three months later Judah was told, “Your daughter-in-law Tamar is guilty of prostitution, and as a result she is now pregnant.”
Judah said, “Bring her out and have her burned to death!”
25 As she was being brought out, she sent a message to her father-in-law. “I am pregnant by the man who owns these,” she said. And she added, “See if you recognize whose seal and cord and staff these are.”
26 Judah recognized them and said, “She is more righteous than I, since I wouldn’t give her to my son Shelah.”