Crocosaurus Cove crocodile manager Nigel Palmer told the Northern Territory News the crocodile mating season only lasted six weeks but Kate and William usually last for more than six months.
"It is totally out of character for crocs," Mr Palmer said.
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"Sometimes she is not so receptive but he certainly is and he will humbug her."
"The kids get inquisitive, they don't know what is going on," He said. "For the parents I think it takes away from the pressure of that sit down talk later on in life."
William measures 4.6m and weighs in at 690kg, while Kate stretches to only 2.8m and weighs 110 kilograms.
The two moved to Crocosaurus Cove 12 months ago.
"When they were out at Noonamah at the croc farm it did not matter. We did not expect the same habits to continue in the city," Mr Palmer told the Northern Territory News.
Mr Palmer said Kate and William are one of their most successful breeding couples, producing about 30 hatchlings each wet season.
