She knew Spratt and 6-year-old Addictive Habit had the race sewn up when she saw the pair charging up the home straight of the group one feature race.
"Before the race, he looked so relaxed and happy that it was hard to say he wasn't going to be in the money."
Explained Graham at the Birdcage, after he found some rhythm back in his palpitating heart: "She's the one who does all the matings and works out where we send our mares and so forth.
"She has a very, very good strike rate at breeding the right horses."
It was the couple's 13th group one winner.
Graham said their confidence in Addictive Habit and Spratt grew from the trainer's faith.
The classic victory was vindication for Addictive Habit after the Roddicks had claimed their mount had had a "bad check" on top of the straight from Pussy O'Reilly at the Makfi Challenge on August 29 which cost him a length and relegated him to fourth place.
After Saturday's windfall of $156,250, the gelding has yielded $623,640 in prizemoney for co-owners the Roddicks, Graham's sister, Anne, and her husband, Colin Scott, Hayden and Leone Nicholas, Bill O'Brien, and Keith and Meryl Treadaway.
Graham said they were partial to having their horses trained at smaller stables that had the propensity to accord them individual attention.
"Lee and Isabell have known each other for about 50 years so they virtually grew up together.
"Lee in our book is a proper horseman and he can see things in horses that other people can't."
Hopes rest on that one-year training relationship to blossom into bigger and better things provided Somervell keeps training and the Roddicks keep on breeding.
Somervell was training privately for Aida Parnwell so when the Roddicks asked him if he could train Addictive Habit the trainer wasn't so sure because he was contracted to the Cambridge Lodge owner and they needed to ask her first.
"Isabell knew the lady quite well and she said of course Lee can train your horses."
Addictive Habit will have a crack at the postponed Windsor Park Plate in Trentham on October 24 before heading to Riccarton for the Coupland's Bakeries Mile on November 11.
Unlike previous seasons, Addictive Habit will be coming back in distance from 2040m to 1600m when he competes in the Windsor Park Plate.
Said Isabell: "He'll have to be a very adaptable horse but Lee will place him right so we have no fears there."
Added Graham: "We have quite a lot of confidence in Lee. He'll freshen up the horse. He doesn't race them week after week.
"Lee'll tell you the horse will tell him when he's ready to race again."
The Roddicks bred Rough Habit who won 11 group ones in Sydney, Melbourne and Brisbane under the tutelage of John Wheeler, including a record three Doomben Cup victories.
The retired Hall of Famer died at the age of 28 last year.
The Roddicks also bred Cinder Bella (2001) who won the Hastings classic with Lance O'Sullivan.
The minor places, meanwhile, were an Adrian and Harry Bull family affair as Benzini finished a fraction more than a length behind the winner while their other entry, Nashville, was fourth almost two lengths behind Celebrity Miss.
Sisters Rosie and Kelly Myers rode the horses, respectively, for the father-and-son trainers.
