A child died after his mother took him to a nightclub.
Marina Tilby, 26, was in New Quay in Ceredigion, UK, with her sister and three men when, drunk, she fell asleep on the four-week-old child after an evening out.
Witnesses report seeing Tilby repeatedly throw and capture his son Darian on his way to a nightclub before returning him to a trailer with the men he met that night.
At 3.30am one of the men offered Tilby his double bed – he put the baby down, then he lay down beside him and fell asleep.
The child was found insensitive lying next to his mother in the early hours of March 31, BBC reports.
Tilby pleaded guilty to voluntary negligence and was imprisoned for two years and four months in prison.
Judge Paul Thomas described the child's death as a "terrible case of maternal selfishness".
Swansea Crown Court heard that Tilby was so drunk that she could not be woken up by her sister who was also in the caravan.
The child was unresponsive and reportedly had blood in his mouth when he was found.
He was rushed to the Bronglais Hospital in Aberystwyth, Wales, where he died later.
Prosecutor Catherine Richards said that Darian had a heart attack after his mother fell asleep on him, although the judge said he felt uncomfortable that medical evidence could not prove a direct cause of death or exclude other causes .
Dyfed Thomas, who defended his mother, said that Tilby was diagnosed with depression following the death of his son and that he "suffered clearly".
"He wants to express remorse and guilt to him that night to the court, to the child's father and his family," he said.
"Her grief will fill her for her son's absence for the rest of his days."
During the sentence, Judge Thomas said: "It is the mother's responsibility, a mother's duty and her natural instinct to put the care and safety of her four-week-old baby first.
"You completely ignored that duty so you could get extremely drunk in a night-out."