While Dwayne Dunn was having a successful day at Randwick, his children were cleaning up closer to home.

His apprentice son Dylan notched a winning hat-trick at the Mornington Cup meeting on Saturday while daughter Jessica won the fashions on the field.

Dunn senior won the Carbine Club Stakes aboard the Lindsay Park galloper He's Our Rokki while Dylan secured his treble for three different trainers.

He outrode his provincial claim in winning aboard Velox in the Land Engineering Handicap and backed it up to score in the following race, the Cleanaway Handicap, leading throughout on Prussian Vixen.

Lindsay Park co-trainer Tom Dabernig said Velox would be set for the Warrnambool Cup.

Dunn's first winner at Mornington saw him share the spoils in the No Fuss Event Hire Handicap with Jake Noonan when A Lotta Love and Mefnooda dead-heated.

"I hate sharing and having to dead-heat with a fellow Mornington boy is even worse," Noonan said.

"It's not like he's going to shout me a beer tonight."

The treble is Dunn's second in the past three weeks and comes on top of riding Leebaz to a Group Three victory at Caulfield last Saturday.

Dunn can claim 1.5kg on provincial tracks until Tuesday despite outriding his claim on Saturday and can still take a 2kg claim in the metropolitan area.