The newlywed won the $15,000 CSI3* Maui Jim Winning Round 1.45m aboard her longtime mount, Goodwill VB.
Show Jumping
In the four-horse jump-off in the 1.50m CSI3* class on Thursday, the Irishman stacked the odds by making up 50 per cent of the lineup.
Collins had stayed on board at CEP to ensure a smooth transition to the new management group, Angelstone Events.
The exact dates in early September 2023 are still to be confirmed; the event will take place on the Snai San Siro Racecourse.
Vanessa Mannix (CAN) and Catinka 25, who won the $100,000 ATCO Cup last week, finished a very close second.
The world number one piloted Bingo Ste Hermelle to grab a spot in the LGCT Super Grand at the GC Playoffs in Prague in November.
Morton wins the $15,000 CSI3* Kubota Canada class at the Summer Fort Classic, while Kassidy Keith takes the second of three U25 events.
After making the podium on three other occasions at the Summer Fort Classic, Mannix broke through with an impressive win.
The Frenchman topped the field of 35 at the Hubside Jumping de Valence in front of grandstands full of enthusiastic crowds.
Competition continues at the Summer Fort Classic CSI3* with Irish rider Robert Blanchette placing one-two in the $25,000 Hunter Derby.