A wildlife park run by TV star Anna Ryder Richardson and her husband has been fined £70,000 for health and safety breaches.
Colin MacDougall, the celebrity interior designer's husband, received a further fine of £4,000 after he admitted to two identical breaches.
At Swansea Crown Court, MacDougall, 46, and Manor House Wildlife Park, west Wales, were ordered to pay a combined £111,000 in fines and costs in relation to the case.
Identical charges against Ryder Richardson were withdrawn last week on the eve of a three-week trial when MacDougall, and the company they jointly run, changed their pleas to guilty.
Gruff Davies-Hughes suffered serious head injuries at the attraction when he was hit by a tree bough when it was blown down in strong winds in August 2010.
The three-year-old spent three days fighting for his life in intensive care after being airlifted to Morriston Hospital, Swansea.
His mother Emme Davies-Hughes suffered head injuries and fractures to her leg, pelvis and arm.
The mother and son, from Llanelli, were among dozens of people visiting the wallaby enclosure at the time.
Judge Paul Thomas was scathing in his condemnation of MacDougall's attitude after the incident. He said a refusal to close the attraction had seen Pembrokeshire County Council act to order it closed on safety grounds.
In the 48 hours after the event, five potentially dangerous trees were felled in the enclosure where it happened. He also highlighted surveys of which MacDougall was aware, and failed to act on, identifying potentially dangerous trees.