The sole mare in the field had won six point-to-points but the last one came in October 2018.
O'Connor sent her into an early lead over this extended two miles seven trip and the mare, in the first-time blinkers, outgunned 2/1 favourite Cardboard Gangster by a length and three quarters for trainer Grainne O'Connor.
None of the other runners could land a blow and it was 27 lengths back to third-placed Roundstone at 50/1.
Derek O'Connor's brother Pauric O'Connor (husband of the trainer) said: "She has six point-to points won and has loads of ability but would be keeping a bit for herself. She didn't need blinkers in point-to-points because she was happy going around the bales so we stuck them on today and it is great to win.
"She has a great page and will be covered in the next few days. I don't know what stallion yet and she'll race away for a few months over the summer.
"Leonard McMahon, from Newmarket House, bred her and has all her family for generations - she has a beautiful old page and it is brilliant to get the win with her."